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99890641 = 393125411
BaseRepresentation
bin1011111010000…
…11010111010001
320221221222012101
411331003113101
5201033000031
613525000401
72322025234
oct575032721
9227858171
1099890641
1151427354
1229553101
1317905ab6
14d3a341b
158b82361
hex5f435d1

99890641 has 4 divisors (see below), whose sum is σ = 99919984. Its totient is φ = 99861300.

The previous prime is 99890627. The next prime is 99890647. The reversal of 99890641 is 14609899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99890641 - 215 = 99857873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99890591 and 99890600.

It is not an unprimeable number, because it can be changed into a prime (99890647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8775 + ... + 16636.

It is an arithmetic number, because the mean of its divisors is an integer number (24979996).

Almost surely, 299890641 is an apocalyptic number.

99890641 is the 8161-st centered triangular number.

It is an amenable number.

99890641 is a deficient number, since it is larger than the sum of its proper divisors (29343).

99890641 is a wasteful number, since it uses less digits than its factorization.

99890641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29342.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 99890641 is about 9994.5305542582. The cubic root of 99890641 is about 463.9896218076.

The spelling of 99890641 in words is "ninety-nine million, eight hundred ninety thousand, six hundred forty-one".

Divisors: 1 3931 25411 99890641