97890057 has 12 divisors (see below), whose sum is σ = 142006644. Its totient is φ = 64978560.

The previous prime is 97890041. The next prime is 97890061. The reversal of 97890057 is 75009879.

It can be written as a sum of positive squares in 2 ways, for example, as 68956416 + 28933641 = 8304^2 + 5379^2 .

It is not a de Polignac number, because 97890057 - 2⁴ = 97890041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97889994 and 97890021.

It is not an unprimeable number, because it can be changed into a prime (97890017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21244 + ... + 25437.

It is an arithmetic number, because the mean of its divisors is an integer number (11833887).

Almost surely, 2^97890057 is an apocalyptic number.

It is an amenable number.

97890057 is a deficient number, since it is larger than the sum of its proper divisors (44116587).

97890057 is a wasteful number, since it uses less digits than its factorization.

97890057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46920 (or 46917 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 97890057 is about 9893.9404182560. The cubic root of 97890057 is about 460.8711547609.

The spelling of 97890057 in words is "ninety-seven million, eight hundred ninety thousand, fifty-seven".