97866931 has 4 divisors (see below), whose sum is σ = 97929000. Its totient is φ = 97804864.

The previous prime is 97866919. The next prime is 97866947. The reversal of 97866931 is 13966879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97866931 - 2¹¹ = 97864883 is a prime.

It is a super-2 number, since 2×97866931² = 19155872366717522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97866911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28606 + ... + 31843.

It is an arithmetic number, because the mean of its divisors is an integer number (24482250).

Almost surely, 2^97866931 is an apocalyptic number.

97866931 is a deficient number, since it is larger than the sum of its proper divisors (62069).

97866931 is a wasteful number, since it uses less digits than its factorization.

97866931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62068.

The product of its digits is 489888, while the sum is 49.

The square root of 97866931 is about 9892.7716540917. The cubic root of 97866931 is about 460.8348591245.

The spelling of 97866931 in words is "ninety-seven million, eight hundred sixty-six thousand, nine hundred thirty-one".