313891993109 has 2 divisors, whose sum is σ = 313891993110. Its totient is φ = 313891993108.

The previous prime is 313891993067. The next prime is 313891993127. The reversal of 313891993109 is 901399198313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307065598225 + 6826394884 = 554135^2 + 82622^2 .

It is a cyclic number.

It is not a de Polignac number, because 313891993109 - 2²⁴ = 313875215893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313891993159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156945996554 + 156945996555.

It is an arithmetic number, because the mean of its divisors is an integer number (156945996555).

Almost surely, 2^313891993109 is an apocalyptic number.

It is an amenable number.

313891993109 is a deficient number, since it is larger than the sum of its proper divisors (1).

313891993109 is an equidigital number, since it uses as much as digits as its factorization.

313891993109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The spelling of 313891993109 in words is "three hundred thirteen billion, eight hundred ninety-one million, nine hundred ninety-three thousand, one hundred nine".