7997937631 has 4 divisors (see below), whose sum is σ = 7998361000. Its totient is φ = 7997514264.

The previous prime is 7997937587. The next prime is 7997937641. The reversal of 7997937631 is 1367397997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1367397997 = 7 ⋅195342571.

It is a cyclic number.

It is not a de Polignac number, because 7997937631 - 2⁷ = 7997937503 is a prime.

It is a super-2 number, since 2×7997937631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7997937631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997937641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181956 + ... + 221593.

It is an arithmetic number, because the mean of its divisors is an integer number (1999590250).

Almost surely, 2^7997937631 is an apocalyptic number.

7997937631 is a deficient number, since it is larger than the sum of its proper divisors (423369).

7997937631 is a wasteful number, since it uses less digits than its factorization.

7997937631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423368.

The product of its digits is 13502538, while the sum is 61.

The square root of 7997937631 is about 89431.1893636666. The cubic root of 7997937631 is about 1999.8281211459.

The spelling of 7997937631 in words is "seven billion, nine hundred ninety-seven million, nine hundred thirty-seven thousand, six hundred thirty-one".