634444999 has 4 divisors (see below), whose sum is σ = 634562136. Its totient is φ = 634327864.

The previous prime is 634444969. The next prime is 634445003. The reversal of 634444999 is 999444436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634444999 - 2⁷ = 634444871 is a prime.

It is a super-2 number, since 2×634444999² = 805040913512220002, 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 (634444969) 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, 50029 + ... + 61414.

It is an arithmetic number, because the mean of its divisors is an integer number (158640534).

Almost surely, 2^634444999 is an apocalyptic number.

634444999 is a deficient number, since it is larger than the sum of its proper divisors (117137).

634444999 is a wasteful number, since it uses less digits than its factorization.

634444999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117136.

The product of its digits is 3359232, while the sum is 52.

The square root of 634444999 is about 25188.1916579972. The cubic root of 634444999 is about 859.2733175455.

The spelling of 634444999 in words is "six hundred thirty-four million, four hundred forty-four thousand, nine hundred ninety-nine".