312813113221729 has 4 divisors (see below), whose sum is σ = 312936316498480. Its totient is φ = 312689909944980.

The previous prime is 312813113221673. The next prime is 312813113221733. The reversal of 312813113221729 is 927122311318213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312813113221729 - 2³¹ = 312810965738081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312813113221789) 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, 61601634567 + ... + 61601639644.

It is an arithmetic number, because the mean of its divisors is an integer number (78234079124620).

Almost surely, 2^{312813113221729} is an apocalyptic number.

It is an amenable number.

312813113221729 is a deficient number, since it is larger than the sum of its proper divisors (123203276751).

312813113221729 is a wasteful number, since it uses less digits than its factorization.

312813113221729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123203276750.

The product of its digits is 217728, while the sum is 46.

The spelling of 312813113221729 in words is "three hundred twelve trillion, eight hundred thirteen billion, one hundred thirteen million, two hundred twenty-one thousand, seven hundred twenty-nine".