97791897 has 12 divisors (see below), whose sum is σ = 151677456. Its totient is φ = 55881000.

The previous prime is 97791839. The next prime is 97791899. The reversal of 97791897 is 79819779.

It is not a de Polignac number, because 97791897 - 2¹² = 97787801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97791899) 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, 332479 + ... + 332772.

It is an arithmetic number, because the mean of its divisors is an integer number (12639788).

Almost surely, 2^97791897 is an apocalyptic number.

It is an amenable number.

97791897 is a deficient number, since it is larger than the sum of its proper divisors (53885559).

97791897 is a wasteful number, since it uses less digits than its factorization.

97791897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665268 (or 665261 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 57.

The square root of 97791897 is about 9888.9785620154. The cubic root of 97791897 is about 460.7170558883.

The spelling of 97791897 in words is "ninety-seven million, seven hundred ninety-one thousand, eight hundred ninety-seven".