1318253909 has 6 divisors (see below), whose sum is σ = 1533479094. Its totient is φ = 1129931880.

The previous prime is 1318253887. The next prime is 1318253921. The reversal of 1318253909 is 9093528131.

It can be written as a sum of positive squares in only one way, i.e., 1260037009 + 58216900 = 35497^2 + 7630^2 .

It is not a de Polignac number, because 1318253909 - 2²⁸ = 1049818453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318253999) 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 5 ways as a sum of consecutive naturals, for example, 13451522 + ... + 13451619.

It is an arithmetic number, because the mean of its divisors is an integer number (255579849).

Almost surely, 2^1318253909 is an apocalyptic number.

It is an amenable number.

1318253909 is a deficient number, since it is larger than the sum of its proper divisors (215225185).

1318253909 is an equidigital number, since it uses as much as digits as its factorization.

1318253909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26903155 (or 26903148 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1318253909 is about 36307.7665107619. The cubic root of 1318253909 is about 1096.4774116351.

The spelling of 1318253909 in words is "one billion, three hundred eighteen million, two hundred fifty-three thousand, nine hundred nine".