99431916 has 12 divisors (see below), whose sum is σ = 232007832. Its totient is φ = 33143968.

The previous prime is 99431903. The next prime is 99432017. The reversal of 99431916 is 61913499.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4142985 + ... + 4143008.

It is an arithmetic number, because the mean of its divisors is an integer number (19333986).

Almost surely, 2^99431916 is an apocalyptic number.

It is an amenable number.

99431916 is an abundant number, since it is smaller than the sum of its proper divisors (132575916).

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

99431916 is a wasteful number, since it uses less digits than its factorization.

99431916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286000 (or 8285998 counting only the distinct ones).

The product of its digits is 52488, while the sum is 42.

The square root of 99431916 is about 9971.5553450803. Note that the first 3 decimals coincide. The cubic root of 99431916 is about 463.2782762705.

The spelling of 99431916 in words is "ninety-nine million, four hundred thirty-one thousand, nine hundred sixteen".