311326912409 has 2 divisors, whose sum is σ = 311326912410. Its totient is φ = 311326912408.

The previous prime is 311326912343. The next prime is 311326912427. The reversal of 311326912409 is 904219623113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294892441600 + 16434470809 = 543040^2 + 128197^2 .

It is a cyclic number.

It is not a de Polignac number, because 311326912409 - 2²⁰ = 311325863833 is a prime.

It is not a weakly prime, because it can be changed into another prime (311326912439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155663456204 + 155663456205.

It is an arithmetic number, because the mean of its divisors is an integer number (155663456205).

Almost surely, 2^311326912409 is an apocalyptic number.

It is an amenable number.

311326912409 is a deficient number, since it is larger than the sum of its proper divisors (1).

311326912409 is an equidigital number, since it uses as much as digits as its factorization.

311326912409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 311326912409 in words is "three hundred eleven billion, three hundred twenty-six million, nine hundred twelve thousand, four hundred nine".