634490357 has 2 divisors, whose sum is σ = 634490358. Its totient is φ = 634490356.

The previous prime is 634490347. The next prime is 634490359. The reversal of 634490357 is 753094436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462723121 + 171767236 = 21511^2 + 13106^2 .

It is a cyclic number.

It is not a de Polignac number, because 634490357 - 2¹⁸ = 634228213 is a prime.

Together with 634490359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634490359) 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, 317245178 + 317245179.

It is an arithmetic number, because the mean of its divisors is an integer number (317245179).

Almost surely, 2^634490357 is an apocalyptic number.

It is an amenable number.

634490357 is a deficient number, since it is larger than the sum of its proper divisors (1).

634490357 is an equidigital number, since it uses as much as digits as its factorization.

634490357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 634490357 is about 25189.0920241282. The cubic root of 634490357 is about 859.2937942300.

The spelling of 634490357 in words is "six hundred thirty-four million, four hundred ninety thousand, three hundred fifty-seven".