97791057 has 40 divisors (see below), whose sum is σ = 179807936. Its totient is φ = 51578208.

The previous prime is 97791053. The next prime is 97791059. The reversal of 97791057 is 75019779.

It is not a de Polignac number, because 97791057 - 2² = 97791053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97791053) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 738 + ... + 14004.

Almost surely, 2^97791057 is an apocalyptic number.

It is an amenable number.

97791057 is a deficient number, since it is larger than the sum of its proper divisors (82016879).

97791057 is a wasteful number, since it uses less digits than its factorization.

97791057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299 (or 13290 counting only the distinct ones).

The product of its (nonzero) digits is 138915, while the sum is 45.

The square root of 97791057 is about 9888.9360903992. The cubic root of 97791057 is about 460.7157367489.

The spelling of 97791057 in words is "ninety-seven million, seven hundred ninety-one thousand, fifty-seven".