634140179 has 2 divisors, whose sum is σ = 634140180. Its totient is φ = 634140178.

The previous prime is 634140161. The next prime is 634140233. The reversal of 634140179 is 971041436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634140179 - 2²⁰ = 633091603 is a prime.

It is not a weakly prime, because it can be changed into another prime (634140109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317070089 + 317070090.

It is an arithmetic number, because the mean of its divisors is an integer number (317070090).

Almost surely, 2^634140179 is an apocalyptic number.

634140179 is a deficient number, since it is larger than the sum of its proper divisors (1).

634140179 is an equidigital number, since it uses as much as digits as its factorization.

634140179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 634140179 is about 25182.1400798264. The cubic root of 634140179 is about 859.1356824726.

The spelling of 634140179 in words is "six hundred thirty-four million, one hundred forty thousand, one hundred seventy-nine".