634645057 has 4 divisors (see below), whose sum is σ = 635588740. Its totient is φ = 633701376.

The previous prime is 634645031. The next prime is 634645079. The reversal of 634645057 is 750546436.

634645057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 153983281 + 480661776 = 12409^2 + 21924^2 .

It is a cyclic number.

It is not a de Polignac number, because 634645057 - 2⁷ = 634644929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634645007) 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, 470832 + ... + 472177.

It is an arithmetic number, because the mean of its divisors is an integer number (158897185).

Almost surely, 2^634645057 is an apocalyptic number.

It is an amenable number.

634645057 is a deficient number, since it is larger than the sum of its proper divisors (943683).

634645057 is an equidigital number, since it uses as much as digits as its factorization.

634645057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943682.

The product of its (nonzero) digits is 302400, while the sum is 40.

The square root of 634645057 is about 25192.1626106216. The cubic root of 634645057 is about 859.3636255764.

The spelling of 634645057 in words is "six hundred thirty-four million, six hundred forty-five thousand, fifty-seven".