313891446989 has 4 divisors (see below), whose sum is σ = 313916881824. Its totient is φ = 313866012156.

The previous prime is 313891446983. The next prime is 313891446997. The reversal of 313891446989 is 989644198313.

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: 989644198313 = 140603 ⋅7038571.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313891446989 is a prime.

It is a super-2 number, since 2×313891446989² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313891446983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12698897 + ... + 12723590.

It is an arithmetic number, because the mean of its divisors is an integer number (78479220456).

Almost surely, 2^313891446989 is an apocalyptic number.

It is an amenable number.

313891446989 is a deficient number, since it is larger than the sum of its proper divisors (25434835).

313891446989 is a wasteful number, since it uses less digits than its factorization.

313891446989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25434834.

The product of its digits is 40310784, while the sum is 65.

The spelling of 313891446989 in words is "three hundred thirteen billion, eight hundred ninety-one million, four hundred forty-six thousand, nine hundred eighty-nine".