1308917317 has 4 divisors (see below), whose sum is σ = 1318471596. Its totient is φ = 1299363040.

The previous prime is 1308917297. The next prime is 1308917347. The reversal of 1308917317 is 7137198031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 343323841 + 965593476 = 18529^2 + 31074^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308917317 - 2¹¹ = 1308915269 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1308917317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308917347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776934 + ... + 4777207.

It is an arithmetic number, because the mean of its divisors is an integer number (329617899).

Almost surely, 2^1308917317 is an apocalyptic number.

It is an amenable number.

1308917317 is a deficient number, since it is larger than the sum of its proper divisors (9554279).

1308917317 is an equidigital number, since it uses as much as digits as its factorization.

1308917317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554278.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 1308917317 is about 36178.9623538321. The cubic root of 1308917317 is about 1093.8826594489.

The spelling of 1308917317 in words is "one billion, three hundred eight million, nine hundred seventeen thousand, three hundred seventeen".