311313293 has 2 divisors, whose sum is σ = 311313294. Its totient is φ = 311313292.

The previous prime is 311313283. The next prime is 311313307. The reversal of 311313293 is 392313113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309302569 + 2010724 = 17587^2 + 1418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311313293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311313283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155656646 + 155656647.

It is an arithmetic number, because the mean of its divisors is an integer number (155656647).

Almost surely, 2^311313293 is an apocalyptic number.

It is an amenable number.

311313293 is a deficient number, since it is larger than the sum of its proper divisors (1).

311313293 is an equidigital number, since it uses as much as digits as its factorization.

311313293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 26.

The square root of 311313293 is about 17644.0724607444. The cubic root of 311313293 is about 677.7443229498.

The spelling of 311313293 in words is "three hundred eleven million, three hundred thirteen thousand, two hundred ninety-three".