1317910909 has 24 divisors (see below), whose sum is σ = 1553787168. Its totient is φ = 1114495200.

The previous prime is 1317910903. The next prime is 1317910921. The reversal of 1317910909 is 9090197131.

It is not a de Polignac number, because 1317910909 - 2²¹ = 1315813757 is a prime.

It is a super-2 number, since 2×1317910909² = 3473778328122412562, which 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 (1317910903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1253434 + ... + 1254484.

It is an arithmetic number, because the mean of its divisors is an integer number (64741132).

Almost surely, 2^1317910909 is an apocalyptic number.

It is an amenable number.

1317910909 is a deficient number, since it is larger than the sum of its proper divisors (235876259).

1317910909 is a wasteful number, since it uses less digits than its factorization.

1317910909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 40.

The square root of 1317910909 is about 36303.0426961708. The cubic root of 1317910909 is about 1096.3823049254.

The spelling of 1317910909 in words is "one billion, three hundred seventeen million, nine hundred ten thousand, nine hundred nine".