634605879 has 8 divisors (see below), whose sum is σ = 847690240. Its totient is φ = 422296056.

The previous prime is 634605877. The next prime is 634605883. The reversal of 634605879 is 978506436.

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

It is not a de Polignac number, because 634605879 - 2¹ = 634605877 is a prime.

It is a super-2 number, since 2×634605879² = 805449243322725282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634605877) 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, 191719 + ... + 195000.

It is an arithmetic number, because the mean of its divisors is an integer number (105961280).

Almost surely, 2^634605879 is an apocalyptic number.

634605879 is a deficient number, since it is larger than the sum of its proper divisors (213084361).

634605879 is a wasteful number, since it uses less digits than its factorization.

634605879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387269.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 634605879 is about 25191.3850155167. The cubic root of 634605879 is about 859.3459417595.

The spelling of 634605879 in words is "six hundred thirty-four million, six hundred five thousand, eight hundred seventy-nine".