634320697 has 2 divisors, whose sum is σ = 634320698. Its totient is φ = 634320696.

The previous prime is 634320679. The next prime is 634320707. The reversal of 634320697 is 796023436.

Together with previous prime (634320679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538750521 + 95570176 = 23211^2 + 9776^2 .

It is a cyclic number.

It is not a de Polignac number, because 634320697 - 2⁷ = 634320569 is a prime.

It is not a weakly prime, because it can be changed into another prime (634320607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317160348 + 317160349.

It is an arithmetic number, because the mean of its divisors is an integer number (317160349).

Almost surely, 2^634320697 is an apocalyptic number.

It is an amenable number.

634320697 is a deficient number, since it is larger than the sum of its proper divisors (1).

634320697 is an equidigital number, since it uses as much as digits as its factorization.

634320697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 634320697 is about 25185.7240713862. The cubic root of 634320697 is about 859.2171969107.

The spelling of 634320697 in words is "six hundred thirty-four million, three hundred twenty thousand, six hundred ninety-seven".