319931451993 has 8 divisors (see below), whose sum is σ = 429292309888. Its totient is φ = 211929114384.

The previous prime is 319931451947. The next prime is 319931452021. The reversal of 319931451993 is 399154139913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 319931451993 - 2²⁶ = 319864343129 is a prime.

It is a super-2 number, since 2×319931451993² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319931455993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339629521 + ... + 339630462.

It is an arithmetic number, because the mean of its divisors is an integer number (53661538736).

Almost surely, 2^319931451993 is an apocalyptic number.

It is an amenable number.

319931451993 is a deficient number, since it is larger than the sum of its proper divisors (109360857895).

319931451993 is a wasteful number, since it uses less digits than its factorization.

319931451993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679260143.

The product of its digits is 3542940, while the sum is 57.

The spelling of 319931451993 in words is "three hundred nineteen billion, nine hundred thirty-one million, four hundred fifty-one thousand, nine hundred ninety-three".