312311983 has 2 divisors, whose sum is σ = 312311984. Its totient is φ = 312311982.

The previous prime is 312311977. The next prime is 312312001. The reversal of 312311983 is 389113213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312311983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312311903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156155991 + 156155992.

It is an arithmetic number, because the mean of its divisors is an integer number (156155992).

Almost surely, 2^312311983 is an apocalyptic number.

312311983 is a deficient number, since it is larger than the sum of its proper divisors (1).

312311983 is an equidigital number, since it uses as much as digits as its factorization.

312311983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 312311983 is about 17672.3508057078. The cubic root of 312311983 is about 678.4682817370.

The spelling of 312311983 in words is "three hundred twelve million, three hundred eleven thousand, nine hundred eighty-three".