311984873 has 2 divisors, whose sum is σ = 311984874. Its totient is φ = 311984872.

The previous prime is 311984809. The next prime is 311984879. The reversal of 311984873 is 378489113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309337744 + 2647129 = 17588^2 + 1627^2 .

It is an emirp because it is prime and its reverse (378489113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311984873 - 2⁶ = 311984809 is a prime.

It is a super-2 number, since 2×311984873² = 194669121961652258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311984879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155992436 + 155992437.

It is an arithmetic number, because the mean of its divisors is an integer number (155992437).

Almost surely, 2^311984873 is an apocalyptic number.

It is an amenable number.

311984873 is a deficient number, since it is larger than the sum of its proper divisors (1).

311984873 is an equidigital number, since it uses as much as digits as its factorization.

311984873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 311984873 is about 17663.0935285980. The cubic root of 311984873 is about 678.2313271318.

The spelling of 311984873 in words is "three hundred eleven million, nine hundred eighty-four thousand, eight hundred seventy-three".