1318507013 has 4 divisors (see below), whose sum is σ = 1325200140. Its totient is φ = 1311813888.

The previous prime is 1318506971. The next prime is 1318507061. The reversal of 1318507013 is 3107058131.

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 1122451009 + 196056004 = 33503^2 + 14002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318507013 - 2²⁶ = 1251398149 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 (1318557013) 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, 3346268 + ... + 3346661.

It is an arithmetic number, because the mean of its divisors is an integer number (331300035).

Almost surely, 2^1318507013 is an apocalyptic number.

It is an amenable number.

1318507013 is a deficient number, since it is larger than the sum of its proper divisors (6693127).

1318507013 is an equidigital number, since it uses as much as digits as its factorization.

1318507013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693126.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1318507013 is about 36311.2518787221. The cubic root of 1318507013 is about 1096.5475814907.

The spelling of 1318507013 in words is "one billion, three hundred eighteen million, five hundred seven thousand, thirteen".