634755947 has 6 divisors (see below), whose sum is σ = 738389628. Its totient is φ = 544076484.

The previous prime is 634755889. The next prime is 634755949. The reversal of 634755947 is 749557436.

It is not a de Polignac number, because 634755947 - 2⁶ = 634755883 is a prime.

It is a super-2 number, since 2×634755947² = 805830224503733618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634755895 and 634755904.

It is not an unprimeable number, because it can be changed into a prime (634755949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6477053 + ... + 6477150.

It is an arithmetic number, because the mean of its divisors is an integer number (123064938).

Almost surely, 2^634755947 is an apocalyptic number.

634755947 is a deficient number, since it is larger than the sum of its proper divisors (103633681).

634755947 is a wasteful number, since it uses less digits than its factorization.

634755947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954217 (or 12954210 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 50.

The square root of 634755947 is about 25194.3633973951. The cubic root of 634755947 is about 859.4136741727.

The spelling of 634755947 in words is "six hundred thirty-four million, seven hundred fifty-five thousand, nine hundred forty-seven".