634943825 has 6 divisors (see below), whose sum is σ = 787330374. Its totient is φ = 507955040.

The previous prime is 634943807. The next prime is 634943833. The reversal of 634943825 is 528349436.

634943825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 195664144 + 439279681 = 13988^2 + 20959^2 .

It is not a de Polignac number, because 634943825 - 2¹⁰ = 634942801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12698852 + ... + 12698901.

It is an arithmetic number, because the mean of its divisors is an integer number (131221729).

Almost surely, 2^634943825 is an apocalyptic number.

It is an amenable number.

634943825 is a deficient number, since it is larger than the sum of its proper divisors (152386549).

634943825 is a wasteful number, since it uses less digits than its factorization.

634943825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25397763 (or 25397758 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 634943825 is about 25198.0916936184. The cubic root of 634943825 is about 859.4984568861.

The spelling of 634943825 in words is "six hundred thirty-four million, nine hundred forty-three thousand, eight hundred twenty-five".