97173931 has 4 divisors (see below), whose sum is σ = 97193664. Its totient is φ = 97154200.

The previous prime is 97173913. The next prime is 97173941. The reversal of 97173931 is 13937179.

It is a happy number.

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 97173931 - 2¹⁹ = 96649643 is a prime.

It is a super-2 number, since 2×97173931² = 18885545731985522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97173911) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4326 + ... + 14596.

It is an arithmetic number, because the mean of its divisors is an integer number (24298416).

Almost surely, 2^97173931 is an apocalyptic number.

97173931 is a deficient number, since it is larger than the sum of its proper divisors (19733).

97173931 is a wasteful number, since it uses less digits than its factorization.

97173931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19732.

The product of its digits is 35721, while the sum is 40.

The square root of 97173931 is about 9857.6838557544. The cubic root of 97173931 is about 459.7445509859.

The spelling of 97173931 in words is "ninety-seven million, one hundred seventy-three thousand, nine hundred thirty-one".