312442243189 has 2 divisors, whose sum is σ = 312442243190. Its totient is φ = 312442243188.

The previous prime is 312442243181. The next prime is 312442243199. The reversal of 312442243189 is 981342244213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284547564900 + 27894678289 = 533430^2 + 167017^2 .

It is an emirp because it is prime and its reverse (981342244213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312442243189 - 2³ = 312442243181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312442243181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156221121594 + 156221121595.

It is an arithmetic number, because the mean of its divisors is an integer number (156221121595).

Almost surely, 2^312442243189 is an apocalyptic number.

It is an amenable number.

312442243189 is a deficient number, since it is larger than the sum of its proper divisors (1).

312442243189 is an equidigital number, since it uses as much as digits as its factorization.

312442243189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 43.

The spelling of 312442243189 in words is "three hundred twelve billion, four hundred forty-two million, two hundred forty-three thousand, one hundred eighty-nine".