312322891 has 2 divisors, whose sum is σ = 312322892. Its totient is φ = 312322890.

The previous prime is 312322859. The next prime is 312322897. The reversal of 312322891 is 198223213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312322891 - 2⁵ = 312322859 is a prime.

It is not a weakly prime, because it can be changed into another prime (312322897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156161445 + 156161446.

It is an arithmetic number, because the mean of its divisors is an integer number (156161446).

Almost surely, 2^312322891 is an apocalyptic number.

312322891 is a deficient number, since it is larger than the sum of its proper divisors (1).

312322891 is an equidigital number, since it uses as much as digits as its factorization.

312322891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 312322891 is about 17672.6594206984. The cubic root of 312322891 is about 678.4761805116.

The spelling of 312322891 in words is "three hundred twelve million, three hundred twenty-two thousand, eight hundred ninety-one".