7972786931 has 2 divisors, whose sum is σ = 7972786932. Its totient is φ = 7972786930.

The previous prime is 7972786919. The next prime is 7972786957. The reversal of 7972786931 is 1396872797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7972786931 - 2¹⁸ = 7972524787 is a prime.

It is a super-2 number, since 2×7972786931² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7972786901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986393465 + 3986393466.

It is an arithmetic number, because the mean of its divisors is an integer number (3986393466).

Almost surely, 2^7972786931 is an apocalyptic number.

7972786931 is a deficient number, since it is larger than the sum of its proper divisors (1).

7972786931 is an equidigital number, since it uses as much as digits as its factorization.

7972786931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 59.

The square root of 7972786931 is about 89290.4638301314. The cubic root of 7972786931 is about 1997.7296680215.

The spelling of 7972786931 in words is "seven billion, nine hundred seventy-two million, seven hundred eighty-six thousand, nine hundred thirty-one".