97164921 has 16 divisors (see below), whose sum is σ = 149145984. Its totient is φ = 55115904.

The previous prime is 97164919. The next prime is 97164967. The reversal of 97164921 is 12946179.

It is not a de Polignac number, because 97164921 - 2¹ = 97164919 is a prime.

It is a super-3 number, since 3×97164921³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97164921.

It is not an unprimeable number, because it can be changed into a prime (97164721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14010 + ... + 19763.

It is an arithmetic number, because the mean of its divisors is an integer number (9321624).

Almost surely, 2^97164921 is an apocalyptic number.

It is an amenable number.

97164921 is a deficient number, since it is larger than the sum of its proper divisors (51981063).

97164921 is a wasteful number, since it uses less digits than its factorization.

97164921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33920.

The product of its digits is 27216, while the sum is 39.

The square root of 97164921 is about 9857.2268412571. The cubic root of 97164921 is about 459.7303413229.

The spelling of 97164921 in words is "ninety-seven million, one hundred sixty-four thousand, nine hundred twenty-one".