6899497931 has 2 divisors, whose sum is σ = 6899497932. Its totient is φ = 6899497930.

The previous prime is 6899497921. The next prime is 6899497973. The reversal of 6899497931 is 1397949986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6899497931 - 2⁶ = 6899497867 is a prime.

It is a super-2 number, since 2×6899497931² = 95206143399746561522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6899497921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449748965 + 3449748966.

It is an arithmetic number, because the mean of its divisors is an integer number (3449748966).

Almost surely, 2^6899497931 is an apocalyptic number.

6899497931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6899497931 is an equidigital number, since it uses as much as digits as its factorization.

6899497931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 65.

The square root of 6899497931 is about 83063.2164739604. The cubic root of 6899497931 is about 1903.7320855753.

The spelling of 6899497931 in words is "six billion, eight hundred ninety-nine million, four hundred ninety-seven thousand, nine hundred thirty-one".