634490253 has 16 divisors (see below), whose sum is σ = 951593600. Its totient is φ = 422992044.

The previous prime is 634490249. The next prime is 634490261. The reversal of 634490253 is 352094436.

634490253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 634490253 - 2² = 634490249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634490243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142873 + ... + 147246.

It is an arithmetic number, because the mean of its divisors is an integer number (59474600).

Almost surely, 2^634490253 is an apocalyptic number.

It is an amenable number.

634490253 is a deficient number, since it is larger than the sum of its proper divisors (317103347).

634490253 is an frugal number, since it uses more digits than its factorization.

634490253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290140 (or 290122 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 634490253 is about 25189.0899597425. The cubic root of 634490253 is about 859.2937472808.

The spelling of 634490253 in words is "six hundred thirty-four million, four hundred ninety thousand, two hundred fifty-three".