6315691 has 2 divisors, whose sum is σ = 6315692. Its totient is φ = 6315690.

The previous prime is 6315677. The next prime is 6315697. The reversal of 6315691 is 1965136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6315691 - 2¹⁹ = 5791403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6315697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3157845 + 3157846.

It is an arithmetic number, because the mean of its divisors is an integer number (3157846).

Almost surely, 2^6315691 is an apocalyptic number.

6315691 is a deficient number, since it is larger than the sum of its proper divisors (1).

6315691 is an equidigital number, since it uses as much as digits as its factorization.

6315691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 6315691 is about 2513.1038577822. The cubic root of 6315691 is about 184.8446809342.

The spelling of 6315691 in words is "six million, three hundred fifteen thousand, six hundred ninety-one".