7997931 has 6 divisors (see below), whose sum is σ = 11552580. Its totient is φ = 5331948.

The previous prime is 7997903. The next prime is 7997933. The reversal of 7997931 is 1397997.

It is not a de Polignac number, because 7997931 - 2⁶ = 7997867 is a prime.

It is a super-2 number, since 2×7997931² = 127933800561522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7997933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444321 + ... + 444338.

It is an arithmetic number, because the mean of its divisors is an integer number (1925430).

Almost surely, 2^7997931 is an apocalyptic number.

7997931 is a deficient number, since it is larger than the sum of its proper divisors (3554649).

7997931 is a wasteful number, since it uses less digits than its factorization.

7997931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888665 (or 888662 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 7997931 is about 2828.0613501125. The cubic root of 7997931 is about 199.9827568467.

The spelling of 7997931 in words is "seven million, nine hundred ninety-seven thousand, nine hundred thirty-one".