99939992 has 8 divisors (see below), whose sum is σ = 187387500. Its totient is φ = 49969992.

The previous prime is 99939967. The next prime is 99940007. The reversal of 99939992 is 29993999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6246242 + ... + 6246257.

Almost surely, 2^99939992 is an apocalyptic number.

It is an amenable number.

99939992 is a deficient number, since it is larger than the sum of its proper divisors (87447508).

99939992 is a wasteful number, since it uses less digits than its factorization.

99939992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12492505 (or 12492501 counting only the distinct ones).

The product of its digits is 3188646, while the sum is 59.

The square root of 99939992 is about 9996.9991497449. Note that the first 3 decimals coincide. The cubic root of 99939992 is about 464.0660206295.

The spelling of 99939992 in words is "ninety-nine million, nine hundred thirty-nine thousand, nine hundred ninety-two".