1317839684369 has 4 divisors (see below), whose sum is σ = 1419211967796. Its totient is φ = 1216467400944.

The previous prime is 1317839684347. The next prime is 1317839684401. The reversal of 1317839684369 is 9634869387131.

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 361306783744 + 956532900625 = 601088^2 + 978025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317839684369 is a prime.

It is a super-2 number, since 2×1317839684369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1317839684299 and 1317839684308.

It is not an unprimeable number, because it can be changed into a prime (1317839684309) 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, 50686141694 + ... + 50686141719.

It is an arithmetic number, because the mean of its divisors is an integer number (354802991949).

Almost surely, 2^{1317839684369} is an apocalyptic number.

It is an amenable number.

1317839684369 is a deficient number, since it is larger than the sum of its proper divisors (101372283427).

1317839684369 is a wasteful number, since it uses less digits than its factorization.

1317839684369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101372283426.

The product of its digits is 141087744, while the sum is 68.

The spelling of 1317839684369 in words is "one trillion, three hundred seventeen billion, eight hundred thirty-nine million, six hundred eighty-four thousand, three hundred sixty-nine".