312239227889 has 2 divisors, whose sum is σ = 312239227890. Its totient is φ = 312239227888.

The previous prime is 312239227871. The next prime is 312239227891. The reversal of 312239227889 is 988722932213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307590033664 + 4649194225 = 554608^2 + 68185^2 .

It is a cyclic number.

It is not a de Polignac number, because 312239227889 - 2¹⁶ = 312239162353 is a prime.

Together with 312239227891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312239227189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156119613944 + 156119613945.

It is an arithmetic number, because the mean of its divisors is an integer number (156119613945).

Almost surely, 2^312239227889 is an apocalyptic number.

It is an amenable number.

312239227889 is a deficient number, since it is larger than the sum of its proper divisors (1).

312239227889 is an equidigital number, since it uses as much as digits as its factorization.

312239227889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The spelling of 312239227889 in words is "three hundred twelve billion, two hundred thirty-nine million, two hundred twenty-seven thousand, eight hundred eighty-nine".