70313005721 has 4 divisors (see below), whose sum is σ = 80357720832. Its totient is φ = 60268290612.

The previous prime is 70313005717. The next prime is 70313005727. The reversal of 70313005721 is 12750031307.

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 70313005721 - 2² = 70313005717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70313005727) 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, 5022357545 + ... + 5022357558.

It is an arithmetic number, because the mean of its divisors is an integer number (20089430208).

Almost surely, 2^70313005721 is an apocalyptic number.

It is an amenable number.

70313005721 is a deficient number, since it is larger than the sum of its proper divisors (10044715111).

70313005721 is a wasteful number, since it uses less digits than its factorization.

70313005721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10044715110.

The product of its (nonzero) digits is 4410, while the sum is 29.

The spelling of 70313005721 in words is "seventy billion, three hundred thirteen million, five thousand, seven hundred twenty-one".