99509697 has 48 divisors (see below), whose sum is σ = 170135680. Its totient is φ = 54867456.

The previous prime is 99509689. The next prime is 99509699. The reversal of 99509697 is 79690599.

It is not a de Polignac number, because 99509697 - 2³ = 99509689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99509699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295113 + ... + 295449.

Almost surely, 2^99509697 is an apocalyptic number.

It is an amenable number.

99509697 is a deficient number, since it is larger than the sum of its proper divisors (70625983).

99509697 is a wasteful number, since it uses less digits than its factorization.

99509697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The square root of 99509697 is about 9975.4547264774. The cubic root of 99509697 is about 463.3990451918.

It can be divided in two parts, 99 and 509697, that added together give a square (509796 = 714²).

The spelling of 99509697 in words is "ninety-nine million, five hundred nine thousand, six hundred ninety-seven".