6864631 has 2 divisors, whose sum is σ = 6864632. Its totient is φ = 6864630.

The previous prime is 6864629. The next prime is 6864653. The reversal of 6864631 is 1364686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6864631 - 2¹ = 6864629 is a prime.

It is a super-2 number, since 2×6864631² = 94246317532322, which contains 22 as substring.

Together with 6864629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6864601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432315 + 3432316.

It is an arithmetic number, because the mean of its divisors is an integer number (3432316).

Almost surely, 2^6864631 is an apocalyptic number.

6864631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6864631 is an equidigital number, since it uses as much as digits as its factorization.

6864631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 6864631 is about 2620.0440835986. The cubic root of 6864631 is about 190.0519802378.

Subtracting from 6864631 its reverse (1364686), we obtain a palindrome (5499945).

The spelling of 6864631 in words is "six million, eight hundred sixty-four thousand, six hundred thirty-one".