634979863 has 8 divisors (see below), whose sum is σ = 726020000. Its totient is φ = 544021920.

The previous prime is 634979857. The next prime is 634979879. The reversal of 634979863 is 368979436.

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 634979863 - 2⁵ = 634979831 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 (634976863) 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, 2988 + ... + 35761.

It is an arithmetic number, because the mean of its divisors is an integer number (90752500).

Almost surely, 2^634979863 is an apocalyptic number.

634979863 is a deficient number, since it is larger than the sum of its proper divisors (91040137).

634979863 is a wasteful number, since it uses less digits than its factorization.

634979863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41097.

The product of its digits is 5878656, while the sum is 55.

The square root of 634979863 is about 25198.8067773059. The cubic root of 634979863 is about 859.5147176523.

The spelling of 634979863 in words is "six hundred thirty-four million, nine hundred seventy-nine thousand, eight hundred sixty-three".