7959891631 has 2 divisors, whose sum is σ = 7959891632. Its totient is φ = 7959891630.

The previous prime is 7959891601. The next prime is 7959891671. The reversal of 7959891631 is 1361989597.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7959891631 - 2²¹ = 7957794479 is a prime.

It is a super-2 number, since 2×7959891631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7959891601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3979945815 + 3979945816.

It is an arithmetic number, because the mean of its divisors is an integer number (3979945816).

Almost surely, 2^7959891631 is an apocalyptic number.

7959891631 is a deficient number, since it is larger than the sum of its proper divisors (1).

7959891631 is an equidigital number, since it uses as much as digits as its factorization.

7959891631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 58.

The square root of 7959891631 is about 89218.2247693822. The cubic root of 7959891631 is about 1996.6520346078.

The spelling of 7959891631 in words is "seven billion, nine hundred fifty-nine million, eight hundred ninety-one thousand, six hundred thirty-one".