927197593921 has 3 divisors (see below), whose sum is σ = 927198556833. Its totient is φ = 927196631010.

The previous prime is 927197593891. The next prime is 927197593939. The reversal of 927197593921 is 129395791729.

The square root of 927197593921 is 962911.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 927197593921 - 2²¹ = 927195496769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (927197593121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 481456 + ... + 1444366.

It is an arithmetic number, because the mean of its divisors is an integer number (309066185611).

Almost surely, 2^927197593921 is an apocalyptic number.

927197593921 is the 962911-st square number.

927197593921 is the 481456-th centered octagonal number.

It is an amenable number.

927197593921 is a deficient number, since it is larger than the sum of its proper divisors (962912).

927197593921 is an frugal number, since it uses more digits than its factorization.

927197593921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925822 (or 962911 counting only the distinct ones).

The product of its digits is 19289340, while the sum is 64.

Multiplying 927197593921 by its sum of digits (64), we get a square (59340646010944 = 7703288²).

The spelling of 927197593921 in words is "nine hundred twenty-seven billion, one hundred ninety-seven million, five hundred ninety-three thousand, nine hundred twenty-one".