696591691 has 2 divisors, whose sum is σ = 696591692. Its totient is φ = 696591690.

The previous prime is 696591659. The next prime is 696591719. The reversal of 696591691 is 196195696.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 696591691 - 2⁵ = 696591659 is a prime.

It is not a weakly prime, because it can be changed into another prime (696591601) 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 as a sum of consecutive naturals, namely, 348295845 + 348295846.

It is an arithmetic number, because the mean of its divisors is an integer number (348295846).

Almost surely, 2^696591691 is an apocalyptic number.

696591691 is a deficient number, since it is larger than the sum of its proper divisors (1).

696591691 is an equidigital number, since it uses as much as digits as its factorization.

696591691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 52.

The square root of 696591691 is about 26393.0235289555. The cubic root of 696591691 is about 886.4605845292.

The spelling of 696591691 in words is "six hundred ninety-six million, five hundred ninety-one thousand, six hundred ninety-one".