311443427 has 2 divisors, whose sum is σ = 311443428. Its totient is φ = 311443426.

The previous prime is 311443409. The next prime is 311443439. The reversal of 311443427 is 724344113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311443427 - 2¹⁰ = 311442403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311443427.

It is not a weakly prime, because it can be changed into another prime (311443487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155721713 + 155721714.

It is an arithmetic number, because the mean of its divisors is an integer number (155721714).

Almost surely, 2^311443427 is an apocalyptic number.

311443427 is a deficient number, since it is larger than the sum of its proper divisors (1).

311443427 is an equidigital number, since it uses as much as digits as its factorization.

311443427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 29.

The square root of 311443427 is about 17647.7598295081. The cubic root of 311443427 is about 677.8387458299.

The spelling of 311443427 in words is "three hundred eleven million, four hundred forty-three thousand, four hundred twenty-seven".