97139992 has 8 divisors (see below), whose sum is σ = 182137500. Its totient is φ = 48569992.

The previous prime is 97139927. The next prime is 97139993. The reversal of 97139992 is 29993179.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97139993) by changing a digit.

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 as a sum of consecutive naturals, namely, 6071242 + ... + 6071257.

Almost surely, 2^97139992 is an apocalyptic number.

It is an amenable number.

97139992 is a deficient number, since it is larger than the sum of its proper divisors (84997508).

97139992 is a wasteful number, since it uses less digits than its factorization.

97139992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142505 (or 12142501 counting only the distinct ones).

The product of its digits is 275562, while the sum is 49.

The square root of 97139992 is about 9855.9622564212. The cubic root of 97139992 is about 459.6910212411.

The spelling of 97139992 in words is "ninety-seven million, one hundred thirty-nine thousand, nine hundred ninety-two".