634140057 has 4 divisors (see below), whose sum is σ = 845520080. Its totient is φ = 422760036.

The previous prime is 634140043. The next prime is 634140097. The reversal of 634140057 is 750041436.

634140057 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 634140057 - 2¹¹ = 634138009 is a prime.

It is a super-2 number, since 2×634140057² = 804267223783926498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634140007) 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, 105690007 + ... + 105690012.

It is an arithmetic number, because the mean of its divisors is an integer number (211380020).

Almost surely, 2^634140057 is an apocalyptic number.

It is an amenable number.

634140057 is a deficient number, since it is larger than the sum of its proper divisors (211380023).

634140057 is a wasteful number, since it uses less digits than its factorization.

634140057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211380022.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 634140057 is about 25182.1376574746. The cubic root of 634140057 is about 859.1356273772.

The spelling of 634140057 in words is "six hundred thirty-four million, one hundred forty thousand, fifty-seven".