1317909717 has 32 divisors (see below), whose sum is σ = 2070921600. Its totient is φ = 825479424.

The previous prime is 1317909667. The next prime is 1317909721. The reversal of 1317909717 is 7179097131.

It is not a de Polignac number, because 1317909717 - 2²² = 1313715413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317909757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300303 + ... + 304659.

It is an arithmetic number, because the mean of its divisors is an integer number (64716300).

Almost surely, 2^1317909717 is an apocalyptic number.

1317909717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1317909717 is a deficient number, since it is larger than the sum of its proper divisors (753011883).

1317909717 is a wasteful number, since it uses less digits than its factorization.

1317909717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042 (or 5036 counting only the distinct ones).

The product of its (nonzero) digits is 83349, while the sum is 45.

The square root of 1317909717 is about 36303.0262788104. The cubic root of 1317909717 is about 1096.3819743800.

The spelling of 1317909717 in words is "one billion, three hundred seventeen million, nine hundred nine thousand, seven hundred seventeen".