634459959 has 40 divisors (see below), whose sum is σ = 1088806400. Its totient is φ = 360662544.

The previous prime is 634459949. The next prime is 634459997. The reversal of 634459959 is 959954436.

634459959 is a `hidden beast` number, since 6 + 3 + 44 + 599 + 5 + 9 = 666.

It is not a de Polignac number, because 634459959 - 2⁵ = 634459927 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (5248800) is a multiple of the sum of its prime divisors (5832).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634459949) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 110022 + ... + 115644.

It is an arithmetic number, because the mean of its divisors is an integer number (27220160).

Almost surely, 2^634459959 is an apocalyptic number.

634459959 is a deficient number, since it is larger than the sum of its proper divisors (454346441).

634459959 is a wasteful number, since it uses less digits than its factorization.

634459959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841 (or 5832 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The square root of 634459959 is about 25188.4886207966. The cubic root of 634459959 is about 859.2800712845.

The spelling of 634459959 in words is "six hundred thirty-four million, four hundred fifty-nine thousand, nine hundred fifty-nine".