634173613 has 2 divisors, whose sum is σ = 634173614. Its totient is φ = 634173612.

The previous prime is 634173601. The next prime is 634173619. The reversal of 634173613 is 316371436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527299369 + 106874244 = 22963^2 + 10338^2 .

It is a cyclic number.

It is not a de Polignac number, because 634173613 - 2⁵ = 634173581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634173619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317086806 + 317086807.

It is an arithmetic number, because the mean of its divisors is an integer number (317086807).

Almost surely, 2^634173613 is an apocalyptic number.

It is an amenable number.

634173613 is a deficient number, since it is larger than the sum of its proper divisors (1).

634173613 is an equidigital number, since it uses as much as digits as its factorization.

634173613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 34.

The square root of 634173613 is about 25182.8039145763. The cubic root of 634173613 is about 859.1507810468.

The spelling of 634173613 in words is "six hundred thirty-four million, one hundred seventy-three thousand, six hundred thirteen".