1317399768 has 64 divisors (see below), whose sum is σ = 3874716000. Its totient is φ = 413300736.

The previous prime is 1317399757. The next prime is 1317399779. The reversal of 1317399768 is 8679937131.

1317399768 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1317399757) and next prime (1317399779).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175713 + ... + 183056.

Almost surely, 2^1317399768 is an apocalyptic number.

1317399768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1317399768 is an abundant number, since it is smaller than the sum of its proper divisors (2557316232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317399768 is a wasteful number, since it uses less digits than its factorization.

1317399768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358801 (or 358791 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 1317399768 is about 36296.0020938946. The cubic root of 1317399768 is about 1096.2405456180.

The spelling of 1317399768 in words is "one billion, three hundred seventeen million, three hundred ninety-nine thousand, seven hundred sixty-eight".