1317821116 has 12 divisors (see below), whose sum is σ = 2309481720. Its totient is φ = 657969200.

The previous prime is 1317821101. The next prime is 1317821123. The reversal of 1317821116 is 6111287131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232186 + ... + 237793.

It is an arithmetic number, because the mean of its divisors is an integer number (192456810).

Almost surely, 2^1317821116 is an apocalyptic number.

It is an amenable number.

1317821116 is a deficient number, since it is larger than the sum of its proper divisors (991660604).

1317821116 is a wasteful number, since it uses less digits than its factorization.

1317821116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470684 (or 470682 counting only the distinct ones).

The product of its digits is 2016, while the sum is 31.

The square root of 1317821116 is about 36301.8059605855. The cubic root of 1317821116 is about 1096.3574044834.

The spelling of 1317821116 in words is "one billion, three hundred seventeen million, eight hundred twenty-one thousand, one hundred sixteen".