311933867149 has 2 divisors, whose sum is σ = 311933867150. Its totient is φ = 311933867148.

The previous prime is 311933867099. The next prime is 311933867171. The reversal of 311933867149 is 941768339113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269449237225 + 42484629924 = 519085^2 + 206118^2 .

It is a cyclic number.

It is not a de Polignac number, because 311933867149 - 2¹¹ = 311933865101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311933867149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311933861149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155966933574 + 155966933575.

It is an arithmetic number, because the mean of its divisors is an integer number (155966933575).

Almost surely, 2^311933867149 is an apocalyptic number.

It is an amenable number.

311933867149 is a deficient number, since it is larger than the sum of its proper divisors (1).

311933867149 is an equidigital number, since it uses as much as digits as its factorization.

311933867149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The spelling of 311933867149 in words is "three hundred eleven billion, nine hundred thirty-three million, eight hundred sixty-seven thousand, one hundred forty-nine".