99931408 has 20 divisors (see below), whose sum is σ = 193786828. Its totient is φ = 49921920.

The previous prime is 99931331. The next prime is 99931411. The reversal of 99931408 is 80413999.

It can be written as a sum of positive squares in 2 ways, for example, as 91240704 + 8690704 = 9552^2 + 2948^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24010 + ... + 27862.

Almost surely, 2^99931408 is an apocalyptic number.

It is an amenable number.

99931408 is a deficient number, since it is larger than the sum of its proper divisors (93855420).

99931408 is a wasteful number, since it uses less digits than its factorization.

99931408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482 (or 5476 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 99931408 is about 9996.5698116904. The cubic root of 99931408 is about 464.0527338004.

The spelling of 99931408 in words is "ninety-nine million, nine hundred thirty-one thousand, four hundred eight".