1312131337 has 8 divisors (see below), whose sum is σ = 1441865952. Its totient is φ = 1184138400.

The previous prime is 1312131329. The next prime is 1312131343. The reversal of 1312131337 is 7331312131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312131337 - 2³ = 1312131329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312131367) 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 7 ways as a sum of consecutive naturals, for example, 433839 + ... + 436852.

It is an arithmetic number, because the mean of its divisors is an integer number (180233244).

Almost surely, 2^1312131337 is an apocalyptic number.

It is an amenable number.

1312131337 is a deficient number, since it is larger than the sum of its proper divisors (129734615).

1312131337 is a wasteful number, since it uses less digits than its factorization.

1312131337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870839.

The product of its digits is 1134, while the sum is 25.

The square root of 1312131337 is about 36223.3534753479. The cubic root of 1312131337 is about 1094.7772632032. Note that the first 3 decimals are identical.

Adding to 1312131337 its reverse (7331312131), we get a palindrome (8643443468).

The spelling of 1312131337 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, three hundred thirty-seven".