972819587831 has 16 divisors (see below), whose sum is σ = 1204485993984. Its totient is φ = 765094395744.

The previous prime is 972819587809. The next prime is 972819587851. The reversal of 972819587831 is 138785918279.

It is a de Polignac number, because none of the positive numbers 2^k-972819587831 is a prime.

It is a super-2 number, since 2×972819587831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972819587851) 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, 31991765 + ... + 32022158.

It is an arithmetic number, because the mean of its divisors is an integer number (75280374624).

Almost surely, 2^972819587831 is an apocalyptic number.

972819587831 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

972819587831 is a deficient number, since it is larger than the sum of its proper divisors (231666406153).

972819587831 is a wasteful number, since it uses less digits than its factorization.

972819587831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64014110.

The product of its digits is 60963840, while the sum is 68.

The spelling of 972819587831 in words is "nine hundred seventy-two billion, eight hundred nineteen million, five hundred eighty-seven thousand, eight hundred thirty-one".