634455139 has 8 divisors (see below), whose sum is σ = 640696320. Its totient is φ = 628235400.

The previous prime is 634455119. The next prime is 634455149. The reversal of 634455139 is 931554436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634455139 - 2⁹ = 634454627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634455119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57694 + ... + 67804.

It is an arithmetic number, because the mean of its divisors is an integer number (80087040).

Almost surely, 2^634455139 is an apocalyptic number.

634455139 is a deficient number, since it is larger than the sum of its proper divisors (6241181).

634455139 is a wasteful number, since it uses less digits than its factorization.

634455139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721.

The product of its digits is 194400, while the sum is 40.

The square root of 634455139 is about 25188.3929419882. The cubic root of 634455139 is about 859.2778952919.

The spelling of 634455139 in words is "six hundred thirty-four million, four hundred fifty-five thousand, one hundred thirty-nine".