634860138313 has 4 divisors (see below), whose sum is σ = 635056753540. Its totient is φ = 634663523088.

The previous prime is 634860138301. The next prime is 634860138337. The reversal of 634860138313 is 313831068436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 321543434304 + 313316704009 = 567048^2 + 559747^2 .

It is a cyclic number.

It is not a de Polignac number, because 634860138313 - 2²⁹ = 634323267401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634860138373) 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, 98302770 + ... + 98309227.

It is an arithmetic number, because the mean of its divisors is an integer number (158764188385).

Almost surely, 2^634860138313 is an apocalyptic number.

It is an amenable number.

634860138313 is a deficient number, since it is larger than the sum of its proper divisors (196615227).

634860138313 is a wasteful number, since it uses less digits than its factorization.

634860138313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196615226.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 634860138313 in words is "six hundred thirty-four billion, eight hundred sixty million, one hundred thirty-eight thousand, three hundred thirteen".