311911423 has 2 divisors, whose sum is σ = 311911424. Its totient is φ = 311911422.

The previous prime is 311911403. The next prime is 311911451. The reversal of 311911423 is 324119113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311911423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311911403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155955711 + 155955712.

It is an arithmetic number, because the mean of its divisors is an integer number (155955712).

Almost surely, 2^311911423 is an apocalyptic number.

311911423 is a deficient number, since it is larger than the sum of its proper divisors (1).

311911423 is an equidigital number, since it uses as much as digits as its factorization.

311911423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 311911423 is about 17661.0142121001. The cubic root of 311911423 is about 678.1780980544.

The spelling of 311911423 in words is "three hundred eleven million, nine hundred eleven thousand, four hundred twenty-three".