319984861793 has 4 divisors (see below), whose sum is σ = 338807500740. Its totient is φ = 301162222848.

The previous prime is 319984861751. The next prime is 319984861811. The reversal of 319984861793 is 397168489913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 397168489913 = 13 ⋅30551422301.

It can be written as a sum of positive squares in 2 ways, for example, as 153795740224 + 166189121569 = 392168^2 + 407663^2 .

It is a cyclic number.

It is not a de Polignac number, because 319984861793 - 2²⁶ = 319917752929 is a prime.

It is a super-2 number, since 2×319984861793² (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 (319984861733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9411319448 + ... + 9411319481.

It is an arithmetic number, because the mean of its divisors is an integer number (84701875185).

Almost surely, 2^319984861793 is an apocalyptic number.

It is an amenable number.

319984861793 is a deficient number, since it is larger than the sum of its proper divisors (18822638947).

319984861793 is a wasteful number, since it uses less digits than its factorization.

319984861793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18822638946.

The product of its digits is 70543872, while the sum is 68.

The spelling of 319984861793 in words is "three hundred nineteen billion, nine hundred eighty-four million, eight hundred sixty-one thousand, seven hundred ninety-three".