634275517 has 2 divisors, whose sum is σ = 634275518. Its totient is φ = 634275516.

The previous prime is 634275511. The next prime is 634275557. The reversal of 634275517 is 715572436.

634275517 is nontrivially palindromic in base 3.

It is an a-pointer prime, because the next prime (634275557) can be obtained adding 634275517 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394459321 + 239816196 = 19861^2 + 15486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634275517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634275517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634275511) 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, 317137758 + 317137759.

It is an arithmetic number, because the mean of its divisors is an integer number (317137759).

Almost surely, 2^634275517 is an apocalyptic number.

It is an amenable number.

634275517 is a deficient number, since it is larger than the sum of its proper divisors (1).

634275517 is an equidigital number, since it uses as much as digits as its factorization.

634275517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The square root of 634275517 is about 25184.8271187237. The cubic root of 634275517 is about 859.1967969486.

The spelling of 634275517 in words is "six hundred thirty-four million, two hundred seventy-five thousand, five hundred seventeen".