312343189 has 2 divisors, whose sum is σ = 312343190. Its totient is φ = 312343188.

The previous prime is 312343127. The next prime is 312343211. The reversal of 312343189 is 981343213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235868164 + 76475025 = 15358^2 + 8745^2 .

It is a cyclic number.

It is not a de Polignac number, because 312343189 - 2⁷ = 312343061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312043189) 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, 156171594 + 156171595.

It is an arithmetic number, because the mean of its divisors is an integer number (156171595).

Almost surely, 2^312343189 is an apocalyptic number.

It is an amenable number.

312343189 is a deficient number, since it is larger than the sum of its proper divisors (1).

312343189 is an equidigital number, since it uses as much as digits as its factorization.

312343189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 312343189 is about 17673.2336882643. The cubic root of 312343189 is about 678.4908783468.

The spelling of 312343189 in words is "three hundred twelve million, three hundred forty-three thousand, one hundred eighty-nine".