634920634 has 8 divisors (see below), whose sum is σ = 961627680. Its totient is φ = 314378076.

The previous prime is 634920631. The next prime is 634920647. The reversal of 634920634 is 436029436.

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

It is a super-2 number, since 2×634920634² = 806248422957923912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634920593 and 634920602.

It is not an unprimeable number, because it can be changed into a prime (634920631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540864 + ... + 1541275.

It is an arithmetic number, because the mean of its divisors is an integer number (120203460).

Almost surely, 2^634920634 is an apocalyptic number.

634920634 is a deficient number, since it is larger than the sum of its proper divisors (326707046).

634920634 is a wasteful number, since it uses less digits than its factorization.

634920634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082244.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 634920634 is about 25197.6315156802. The cubic root of 634920634 is about 859.4879925108.

The spelling of 634920634 in words is "six hundred thirty-four million, nine hundred twenty thousand, six hundred thirty-four".