634351243 has 18 divisors (see below), whose sum is σ = 687718068. Its totient is φ = 584876160.

The previous prime is 634351219. The next prime is 634351253. The reversal of 634351243 is 342153436.

It is not a de Polignac number, because 634351243 - 2²⁵ = 600796811 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (634351253) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3504613 + ... + 3504793.

Almost surely, 2^634351243 is an apocalyptic number.

634351243 is a deficient number, since it is larger than the sum of its proper divisors (53366825).

634351243 is an equidigital number, since it uses as much as digits as its factorization.

634351243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 265 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

The square root of 634351243 is about 25186.3304790515. The cubic root of 634351243 is about 859.2309886869.

The spelling of 634351243 in words is "six hundred thirty-four million, three hundred fifty-one thousand, two hundred forty-three".