634713123757 has 2 divisors, whose sum is σ = 634713123758. Its totient is φ = 634713123756.

The previous prime is 634713123749. The next prime is 634713123763. The reversal of 634713123757 is 757321317436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634708582596 + 4541161 = 796686^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 634713123757 - 2³ = 634713123749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634713123757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634713123857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317356561878 + 317356561879.

It is an arithmetic number, because the mean of its divisors is an integer number (317356561879).

Almost surely, 2^634713123757 is an apocalyptic number.

It is an amenable number.

634713123757 is a deficient number, since it is larger than the sum of its proper divisors (1).

634713123757 is an equidigital number, since it uses as much as digits as its factorization.

634713123757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 49.

The spelling of 634713123757 in words is "six hundred thirty-four billion, seven hundred thirteen million, one hundred twenty-three thousand, seven hundred fifty-seven".