1311883909 has 6 divisors (see below), whose sum is σ = 1526069094. Its totient is φ = 1124471880.

The previous prime is 1311883891. The next prime is 1311883943. The reversal of 1311883909 is 9093881131.

It can be written as a sum of positive squares in only one way, i.e., 1247643684 + 64240225 = 35322^2 + 8015^2 .

It is not a de Polignac number, because 1311883909 - 2¹³ = 1311875717 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 (1311883009) 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 5 ways as a sum of consecutive naturals, for example, 13386522 + ... + 13386619.

It is an arithmetic number, because the mean of its divisors is an integer number (254344849).

Almost surely, 2^1311883909 is an apocalyptic number.

It is an amenable number.

1311883909 is a deficient number, since it is larger than the sum of its proper divisors (214185185).

1311883909 is an equidigital number, since it uses as much as digits as its factorization.

1311883909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26773155 (or 26773148 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1311883909 is about 36219.9380038122. The cubic root of 1311883909 is about 1094.7084449964.

The spelling of 1311883909 in words is "one billion, three hundred eleven million, eight hundred eighty-three thousand, nine hundred nine".