319743862813 has 4 divisors (see below), whose sum is σ = 319950283900. Its totient is φ = 319537441728.

The previous prime is 319743862811. The next prime is 319743862819. The reversal of 319743862813 is 318268347913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171878234724 + 147865628089 = 414582^2 + 384533^2 .

It is a cyclic number.

It is not a de Polignac number, because 319743862813 - 2¹ = 319743862811 is a prime.

It is a super-2 number, since 2×319743862813² (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 (319743862811) 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, 103208220 + ... + 103211317.

It is an arithmetic number, because the mean of its divisors is an integer number (79987570975).

Almost surely, 2^319743862813 is an apocalyptic number.

It is an amenable number.

319743862813 is a deficient number, since it is larger than the sum of its proper divisors (206421087).

319743862813 is a wasteful number, since it uses less digits than its factorization.

319743862813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206421086.

The product of its digits is 5225472, while the sum is 55.

The spelling of 319743862813 in words is "three hundred nineteen billion, seven hundred forty-three million, eight hundred sixty-two thousand, eight hundred thirteen".