313997557993 has 4 divisors (see below), whose sum is σ = 358854352000. Its totient is φ = 269140763988.

The previous prime is 313997557987. The next prime is 313997557999. The reversal of 313997557993 is 399755799313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 399755799313 = 13 ⋅30750446101.

It is an interprime number because it is at equal distance from previous prime (313997557987) and next prime (313997557999).

It is a cyclic number.

It is not a de Polignac number, because 313997557993 - 2⁹ = 313997557481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313997557999) 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, 22428396993 + ... + 22428397006.

It is an arithmetic number, because the mean of its divisors is an integer number (89713588000).

Almost surely, 2^313997557993 is an apocalyptic number.

It is an amenable number.

313997557993 is a deficient number, since it is larger than the sum of its proper divisors (44856794007).

313997557993 is an equidigital number, since it uses as much as digits as its factorization.

313997557993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44856794006.

The product of its digits is 217005075, while the sum is 70.

The spelling of 313997557993 in words is "three hundred thirteen billion, nine hundred ninety-seven million, five hundred fifty-seven thousand, nine hundred ninety-three".