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1354991653 = 2602952057
BaseRepresentation
bin101000011000011…
…1000100000100101
310111102122201010001
41100300320200211
510233334213103
6342242101301
745402144661
oct12060704045
93442581101
101354991653
11635948314
1231994a831
13187950412
14cbd578a1
157de5401d
hex50c38825

1354991653 has 4 divisors (see below), whose sum is σ = 1355069740. Its totient is φ = 1354913568.

The previous prime is 1354991639. The next prime is 1354991713. The reversal of 1354991653 is 3561994531.

1354991653 is a nontrivial binomial coefficient, being equal to C(52058, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 434597409 + 920394244 = 20847^2 + 30338^2 .

It is a 3-Lehmer number, since φ(1354991653) divides (1354991653-1)3.

It is a cyclic number.

It is not a de Polignac number, because 1354991653 - 217 = 1354860581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1354911653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 52057.

It is an arithmetic number, because the mean of its divisors is an integer number (338767435).

It is a Poulet number, since it divides 21354991652-1.

Almost surely, 21354991653 is an apocalyptic number.

1354991653 is the 52057-th triangular number and also the 26029-th hexagonal number.

1354991653 is the 17353-rd centered nonagonal number.

It is an amenable number.

1354991653 is a deficient number, since it is larger than the sum of its proper divisors (78087).

1354991653 is an equidigital number, since it uses as much as digits as its factorization.

1354991653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086.

The product of its digits is 437400, while the sum is 46.

The square root of 1354991653 is about 36810.2112599208. The cubic root of 1354991653 is about 1106.5699524258.

The spelling of 1354991653 in words is "one billion, three hundred fifty-four million, nine hundred ninety-one thousand, six hundred fifty-three".

Divisors: 1 26029 52057 1354991653