634996517 has 2 divisors, whose sum is σ = 634996518. Its totient is φ = 634996516.

The previous prime is 634996513. The next prime is 634996541. The reversal of 634996517 is 715699436.

634996517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412658596 + 222337921 = 20314^2 + 14911^2 .

It is a cyclic number.

It is not a de Polignac number, because 634996517 - 2² = 634996513 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634996513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317498258 + 317498259.

It is an arithmetic number, because the mean of its divisors is an integer number (317498259).

Almost surely, 2^634996517 is an apocalyptic number.

It is an amenable number.

634996517 is a deficient number, since it is larger than the sum of its proper divisors (1).

634996517 is an equidigital number, since it uses as much as digits as its factorization.

634996517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 50.

The square root of 634996517 is about 25199.1372272941. The cubic root of 634996517 is about 859.5222319237.

The spelling of 634996517 in words is "six hundred thirty-four million, nine hundred ninety-six thousand, five hundred seventeen".