6997971131 has 4 divisors (see below), whose sum is σ = 7004203752. Its totient is φ = 6991738512.

The previous prime is 6997971119. The next prime is 6997971133. The reversal of 6997971131 is 1311797996.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6997971131 - 2⁶ = 6997971067 is a prime.

It is a super-2 number, since 2×6997971131² = 97943199900618838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6997971133) 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, 3114626 + ... + 3116871.

It is an arithmetic number, because the mean of its divisors is an integer number (1751050938).

Almost surely, 2^6997971131 is an apocalyptic number.

6997971131 is a deficient number, since it is larger than the sum of its proper divisors (6232621).

6997971131 is a wasteful number, since it uses less digits than its factorization.

6997971131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232620.

The product of its digits is 642978, while the sum is 53.

The square root of 6997971131 is about 83653.8769633542. The cubic root of 6997971131 is about 1912.7463512582.

The spelling of 6997971131 in words is "six billion, nine hundred ninety-seven million, nine hundred seventy-one thousand, one hundred thirty-one".