634742179 has 2 divisors, whose sum is σ = 634742180. Its totient is φ = 634742178.

The previous prime is 634742123. The next prime is 634742219. The reversal of 634742179 is 971247436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634742179 - 2¹³ = 634733987 is a prime.

It is not a weakly prime, because it can be changed into another prime (634742579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317371089 + 317371090.

It is an arithmetic number, because the mean of its divisors is an integer number (317371090).

Almost surely, 2^634742179 is an apocalyptic number.

634742179 is a deficient number, since it is larger than the sum of its proper divisors (1).

634742179 is an equidigital number, since it uses as much as digits as its factorization.

634742179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 634742179 is about 25194.0901601943. The cubic root of 634742179 is about 859.4074605021.

The spelling of 634742179 in words is "six hundred thirty-four million, seven hundred forty-two thousand, one hundred seventy-nine".