634320679 has 2 divisors, whose sum is σ = 634320680. Its totient is φ = 634320678.

The previous prime is 634320653. The next prime is 634320697. The reversal of 634320679 is 976023436.

Together with next prime (634320697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634320679 - 2¹³ = 634312487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634320619) 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, 317160339 + 317160340.

It is an arithmetic number, because the mean of its divisors is an integer number (317160340).

Almost surely, 2^634320679 is an apocalyptic number.

634320679 is a deficient number, since it is larger than the sum of its proper divisors (1).

634320679 is an equidigital number, since it uses as much as digits as its factorization.

634320679 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 634320679 is about 25185.7237140409. The cubic root of 634320679 is about 859.2171887835.

The spelling of 634320679 in words is "six hundred thirty-four million, three hundred twenty thousand, six hundred seventy-nine".