634960691 has 2 divisors, whose sum is σ = 634960692. Its totient is φ = 634960690.

The previous prime is 634960687. The next prime is 634960699. The reversal of 634960691 is 196069436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634960691 - 2² = 634960687 is a prime.

It is not a weakly prime, because it can be changed into another prime (634960699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317480345 + 317480346.

It is an arithmetic number, because the mean of its divisors is an integer number (317480346).

Almost surely, 2^634960691 is an apocalyptic number.

634960691 is a deficient number, since it is larger than the sum of its proper divisors (1).

634960691 is an equidigital number, since it uses as much as digits as its factorization.

634960691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 634960691 is about 25198.4263595963. The cubic root of 634960691 is about 859.5060670987.

The spelling of 634960691 in words is "six hundred thirty-four million, nine hundred sixty thousand, six hundred ninety-one".