1312685499 has 4 divisors (see below), whose sum is σ = 1750247336. Its totient is φ = 875123664.

The previous prime is 1312685497. The next prime is 1312685531. The reversal of 1312685499 is 9945862131.

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

It is not a de Polignac number, because 1312685499 - 2¹ = 1312685497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312685497) 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, 218780914 + ... + 218780919.

It is an arithmetic number, because the mean of its divisors is an integer number (437561834).

Almost surely, 2^1312685499 is an apocalyptic number.

1312685499 is a deficient number, since it is larger than the sum of its proper divisors (437561837).

1312685499 is an equidigital number, since it uses as much as digits as its factorization.

1312685499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437561836.

The product of its digits is 466560, while the sum is 48.

The square root of 1312685499 is about 36231.0019044464. The cubic root of 1312685499 is about 1094.9313632673.

The spelling of 1312685499 in words is "one billion, three hundred twelve million, six hundred eighty-five thousand, four hundred ninety-nine".