99309897 has 12 divisors (see below), whose sum is σ = 143615680. Its totient is φ = 66129048.

The previous prime is 99309871. The next prime is 99309923. The reversal of 99309897 is 79890399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99309871) and next prime (99309923).

It is not a de Polignac number, because 99309897 - 2⁸ = 99309641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99309697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2268 + ... + 14274.

Almost surely, 2^99309897 is an apocalyptic number.

It is an amenable number.

99309897 is a deficient number, since it is larger than the sum of its proper divisors (44305783).

99309897 is a wasteful number, since it uses less digits than its factorization.

99309897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932 (or 12929 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 99309897 is about 9965.4351134308. The cubic root of 99309897 is about 463.0886929746.

The spelling of 99309897 in words is "ninety-nine million, three hundred nine thousand, eight hundred ninety-seven".