99431664 has 20 divisors (see below), whose sum is σ = 256865256. Its totient is φ = 33143872.

The previous prime is 99431659. The next prime is 99431669. The reversal of 99431664 is 46613499.

It is an interprime number because it is at equal distance from previous prime (99431659) and next prime (99431669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99431669) 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, 1035699 + ... + 1035794.

Almost surely, 2^99431664 is an apocalyptic number.

It is an amenable number.

99431664 is an abundant number, since it is smaller than the sum of its proper divisors (157433592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99431664 is a wasteful number, since it uses less digits than its factorization.

99431664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071504 (or 2071498 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 99431664 is about 9971.5427091298. The cubic root of 99431664 is about 463.2778848931.

The spelling of 99431664 in words is "ninety-nine million, four hundred thirty-one thousand, six hundred sixty-four".