1317539999 has 4 divisors (see below), whose sum is σ = 1317613080. Its totient is φ = 1317466920.

The previous prime is 1317539983. The next prime is 1317540013. The reversal of 1317539999 is 9999357131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1317539999 - 2⁴ = 1317539983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317539929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11972 + ... + 52710.

It is an arithmetic number, because the mean of its divisors is an integer number (329403270).

Almost surely, 2^1317539999 is an apocalyptic number.

1317539999 is a deficient number, since it is larger than the sum of its proper divisors (73081).

1317539999 is an equidigital number, since it uses as much as digits as its factorization.

1317539999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73080.

The product of its digits is 2066715, while the sum is 56.

The square root of 1317539999 is about 36297.9338117199. The cubic root of 1317539999 is about 1096.2794407855.

The spelling of 1317539999 in words is "one billion, three hundred seventeen million, five hundred thirty-nine thousand, nine hundred ninety-nine".