99931377 has 32 divisors (see below), whose sum is σ = 164586240. Its totient is φ = 52519680.

The previous prime is 99931331. The next prime is 99931411. The reversal of 99931377 is 77313999.

It is not a de Polignac number, because 99931377 - 2⁶ = 99931313 is a prime.

It is a super-2 number, since 2×99931377² = 19972560218232258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (99931327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105727 + ... + 106667.

It is an arithmetic number, because the mean of its divisors is an integer number (5143320).

Almost surely, 2^99931377 is an apocalyptic number.

It is an amenable number.

99931377 is a deficient number, since it is larger than the sum of its proper divisors (64654863).

99931377 is a wasteful number, since it uses less digits than its factorization.

99931377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its digits is 321489, while the sum is 48.

The square root of 99931377 is about 9996.5682611584. The cubic root of 99931377 is about 464.0526858154.

The spelling of 99931377 in words is "ninety-nine million, nine hundred thirty-one thousand, three hundred seventy-seven".