1312348831 has 4 divisors (see below), whose sum is σ = 1312903312. Its totient is φ = 1311794352.

The previous prime is 1312348801. The next prime is 1312348841. The reversal of 1312348831 is 1388432131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312348831 - 2⁹ = 1312348319 is a prime.

It is a super-4 number, since 4×1312348831⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312348801) 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, 273675 + ... + 278428.

It is an arithmetic number, because the mean of its divisors is an integer number (328225828).

Almost surely, 2^1312348831 is an apocalyptic number.

1312348831 is a deficient number, since it is larger than the sum of its proper divisors (554481).

1312348831 is an equidigital number, since it uses as much as digits as its factorization.

1312348831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554480.

The product of its digits is 13824, while the sum is 34.

The square root of 1312348831 is about 36226.3554749853. The cubic root of 1312348831 is about 1094.8377485943.

The spelling of 1312348831 in words is "one billion, three hundred twelve million, three hundred forty-eight thousand, eight hundred thirty-one".