311983927 has 2 divisors, whose sum is σ = 311983928. Its totient is φ = 311983926.

The previous prime is 311983909. The next prime is 311983939. The reversal of 311983927 is 729389113.

It is a strong prime.

It is an emirp because it is prime and its reverse (729389113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311983927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311983957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155991963 + 155991964.

It is an arithmetic number, because the mean of its divisors is an integer number (155991964).

Almost surely, 2^311983927 is an apocalyptic number.

311983927 is a deficient number, since it is larger than the sum of its proper divisors (1).

311983927 is an equidigital number, since it uses as much as digits as its factorization.

311983927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 311983927 is about 17663.0667495766. The cubic root of 311983927 is about 678.2306416205.

The spelling of 311983927 in words is "three hundred eleven million, nine hundred eighty-three thousand, nine hundred twenty-seven".