311243479 has 2 divisors, whose sum is σ = 311243480. Its totient is φ = 311243478.

The previous prime is 311243459. The next prime is 311243483. The reversal of 311243479 is 974342113.

It is a strong prime.

It is an emirp because it is prime and its reverse (974342113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311243479 - 2¹⁷ = 311112407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311243459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155621739 + 155621740.

It is an arithmetic number, because the mean of its divisors is an integer number (155621740).

Almost surely, 2^311243479 is an apocalyptic number.

311243479 is a deficient number, since it is larger than the sum of its proper divisors (1).

311243479 is an equidigital number, since it uses as much as digits as its factorization.

311243479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 311243479 is about 17642.0939516827. The cubic root of 311243479 is about 677.6936563270.

The spelling of 311243479 in words is "three hundred eleven million, two hundred forty-three thousand, four hundred seventy-nine".