1317000391 has 12 divisors (see below), whose sum is σ = 1541429112. Its totient is φ = 1121925168.

The previous prime is 1317000383. The next prime is 1317000437. The reversal of 1317000391 is 1930007131.

It is not a de Polignac number, because 1317000391 - 2³ = 1317000383 is a prime.

It is the 36291-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317000341) by changing a digit.

It is a nontrivial repunit in base 36290.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74460 + ... + 90433.

It is an arithmetic number, because the mean of its divisors is an integer number (128452426).

Almost surely, 2^1317000391 is an apocalyptic number.

1317000391 is a deficient number, since it is larger than the sum of its proper divisors (224428721).

1317000391 is a wasteful number, since it uses less digits than its factorization.

1317000391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165070 (or 165063 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 1317000391 is about 36290.5000103333. The cubic root of 1317000391 is about 1096.1297573009.

The spelling of 1317000391 in words is "one billion, three hundred seventeen million, three hundred ninety-one", and thus it is an aban number.