634479999 has 8 divisors (see below), whose sum is σ = 850700160. Its totient is φ = 420623256.

The previous prime is 634479991. The next prime is 634480027. The reversal of 634479999 is 999974436.

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

It is not a de Polignac number, because 634479999 - 2³ = 634479991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634479991) 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, 590227 + ... + 591300.

It is an arithmetic number, because the mean of its divisors is an integer number (106337520).

Almost surely, 2^634479999 is an apocalyptic number.

634479999 is a deficient number, since it is larger than the sum of its proper divisors (216220161).

634479999 is a wasteful number, since it uses less digits than its factorization.

634479999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181709.

The product of its digits is 13226976, while the sum is 60.

The square root of 634479999 is about 25188.8864184187. The cubic root of 634479999 is about 859.2891182391.

The spelling of 634479999 in words is "six hundred thirty-four million, four hundred seventy-nine thousand, nine hundred ninety-nine".