311432939 has 2 divisors, whose sum is σ = 311432940. Its totient is φ = 311432938.

The previous prime is 311432887. The next prime is 311432969. The reversal of 311432939 is 939234113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311432939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 311432899 and 311432908.

It is not a weakly prime, because it can be changed into another prime (311432969) 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, 155716469 + 155716470.

It is an arithmetic number, because the mean of its divisors is an integer number (155716470).

Almost surely, 2^311432939 is an apocalyptic number.

311432939 is a deficient number, since it is larger than the sum of its proper divisors (1).

311432939 is an equidigital number, since it uses as much as digits as its factorization.

311432939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 311432939 is about 17647.4626788102. The cubic root of 311432939 is about 677.8311369012.

The spelling of 311432939 in words is "three hundred eleven million, four hundred thirty-two thousand, nine hundred thirty-nine".