99777992 has 32 divisors (see below), whose sum is σ = 191980800. Its totient is φ = 48593664.

The previous prime is 99777971. The next prime is 99778013. The reversal of 99777992 is 29977799.

It is an interprime number because it is at equal distance from previous prime (99777971) and next prime (99778013).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98384 + ... + 99392.

It is an arithmetic number, because the mean of its divisors is an integer number (5999400).

Almost surely, 2^99777992 is an apocalyptic number.

It is an amenable number.

99777992 is a deficient number, since it is larger than the sum of its proper divisors (92202808).

99777992 is a wasteful number, since it uses less digits than its factorization.

99777992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1321 counting only the distinct ones).

The product of its digits is 4500846, while the sum is 59.

The square root of 99777992 is about 9988.8934322076. The cubic root of 99777992 is about 463.8151389043.

The spelling of 99777992 in words is "ninety-nine million, seven hundred seventy-seven thousand, nine hundred ninety-two".