313131010987 has 2 divisors, whose sum is σ = 313131010988. Its totient is φ = 313131010986.

The previous prime is 313131010979. The next prime is 313131011023. The reversal of 313131010987 is 789010131313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313131010987 - 2³ = 313131010979 is a prime.

It is not a weakly prime, because it can be changed into another prime (313131010487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156565505493 + 156565505494.

It is an arithmetic number, because the mean of its divisors is an integer number (156565505494).

Almost surely, 2^313131010987 is an apocalyptic number.

313131010987 is a deficient number, since it is larger than the sum of its proper divisors (1).

313131010987 is an equidigital number, since it uses as much as digits as its factorization.

313131010987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 313131010987 in words is "three hundred thirteen billion, one hundred thirty-one million, ten thousand, nine hundred eighty-seven".