1312883881 has 8 divisors (see below), whose sum is σ = 1319004360. Its totient is φ = 1306773888.

The previous prime is 1312883879. The next prime is 1312883921. The reversal of 1312883881 is 1883882131.

It can be written as a sum of positive squares in 4 ways, for example, as 349091856 + 963792025 = 18684^2 + 31045^2 .

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 1312883881 - 2¹ = 1312883879 is a prime.

It is a super-2 number, since 2×1312883881² = 3447328169979244322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312886881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355215 + ... + 358891.

It is an arithmetic number, because the mean of its divisors is an integer number (164875545).

Almost surely, 2^1312883881 is an apocalyptic number.

It is an amenable number.

1312883881 is a deficient number, since it is larger than the sum of its proper divisors (6120479).

1312883881 is a wasteful number, since it uses less digits than its factorization.

1312883881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243.

The product of its digits is 73728, while the sum is 43.

The square root of 1312883881 is about 36233.7395392747. The cubic root of 1312883881 is about 1094.9865183247.

The spelling of 1312883881 in words is "one billion, three hundred twelve million, eight hundred eighty-three thousand, eight hundred eighty-one".