311798863 has 2 divisors, whose sum is σ = 311798864. Its totient is φ = 311798862.

The previous prime is 311798857. The next prime is 311798897. The reversal of 311798863 is 368897113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311798863 - 2⁵ = 311798831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311798813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155899431 + 155899432.

It is an arithmetic number, because the mean of its divisors is an integer number (155899432).

Almost surely, 2^311798863 is an apocalyptic number.

311798863 is a deficient number, since it is larger than the sum of its proper divisors (1).

311798863 is an equidigital number, since it uses as much as digits as its factorization.

311798863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 311798863 is about 17657.8272445961. The cubic root of 311798863 is about 678.0965098155.

The spelling of 311798863 in words is "three hundred eleven million, seven hundred ninety-eight thousand, eight hundred sixty-three".