813723327319 has 4 divisors (see below), whose sum is σ = 929969516944. Its totient is φ = 697477137696.

The previous prime is 813723327311. The next prime is 813723327341. The reversal of 813723327319 is 913723327318.

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

It is a cyclic number.

It is not a de Polignac number, because 813723327319 - 2³ = 813723327311 is a prime.

It is a super-2 number, since 2×813723327319² (a number of 25 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 (813723327311) 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, 58123094802 + ... + 58123094815.

It is an arithmetic number, because the mean of its divisors is an integer number (232492379236).

Almost surely, 2^813723327319 is an apocalyptic number.

813723327319 is a deficient number, since it is larger than the sum of its proper divisors (116246189625).

813723327319 is a wasteful number, since it uses less digits than its factorization.

813723327319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116246189624.

The product of its digits is 1143072, while the sum is 49.

Subtracting 813723327319 from its reverse (913723327318), we obtain a palindrome (99999999999).

The spelling of 813723327319 in words is "eight hundred thirteen billion, seven hundred twenty-three million, three hundred twenty-seven thousand, three hundred nineteen".