634651159 has 2 divisors, whose sum is σ = 634651160. Its totient is φ = 634651158.

The previous prime is 634651153. The next prime is 634651163. The reversal of 634651159 is 951156436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634651159 - 2³ = 634651151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634651151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317325579 + 317325580.

It is an arithmetic number, because the mean of its divisors is an integer number (317325580).

Almost surely, 2^634651159 is an apocalyptic number.

634651159 is a deficient number, since it is larger than the sum of its proper divisors (1).

634651159 is an equidigital number, since it uses as much as digits as its factorization.

634651159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 634651159 is about 25192.2837194249. The cubic root of 634651159 is about 859.3663797773.

The spelling of 634651159 in words is "six hundred thirty-four million, six hundred fifty-one thousand, one hundred fifty-nine".