311404279 has 2 divisors, whose sum is σ = 311404280. Its totient is φ = 311404278.

The previous prime is 311404277. The next prime is 311404339. The reversal of 311404279 is 972404113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311404279 - 2¹ = 311404277 is a prime.

Together with 311404277, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 311404279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311404273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155702139 + 155702140.

It is an arithmetic number, because the mean of its divisors is an integer number (155702140).

Almost surely, 2^311404279 is an apocalyptic number.

311404279 is a deficient number, since it is larger than the sum of its proper divisors (1).

311404279 is an equidigital number, since it uses as much as digits as its factorization.

311404279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 311404279 is about 17646.6506453774. The cubic root of 311404279 is about 677.8103435147.

The spelling of 311404279 in words is "three hundred eleven million, four hundred four thousand, two hundred seventy-nine".