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663699013 = 1934931527
BaseRepresentation
bin100111100011110…
…011111001000101
31201020212101212221
4213203303321011
52324401332023
6145505212341
722306230355
oct4743637105
91636771787
10663699013
1131070598a
121663310b1
13a766c413
1464208b65
153d40185d
hex278f3e45

663699013 has 4 divisors (see below), whose sum is σ = 698630560. Its totient is φ = 628767468.

The previous prime is 663698957. The next prime is 663699031. The reversal of 663699013 is 310996366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310996366 = 2155498183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-663699013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663699053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17465745 + ... + 17465782.

It is an arithmetic number, because the mean of its divisors is an integer number (174657640).

Almost surely, 2663699013 is an apocalyptic number.

It is an amenable number.

663699013 is a deficient number, since it is larger than the sum of its proper divisors (34931547).

663699013 is a wasteful number, since it uses less digits than its factorization.

663699013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34931546.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 663699013 is about 25762.3565110026. The cubic root of 663699013 is about 872.2822944320.

The spelling of 663699013 in words is "six hundred sixty-three million, six hundred ninety-nine thousand, thirteen".

Divisors: 1 19 34931527 663699013