312112387 has 2 divisors, whose sum is σ = 312112388. Its totient is φ = 312112386.

The previous prime is 312112349. The next prime is 312112393. The reversal of 312112387 is 783211213.

It is a strong prime.

It is an emirp because it is prime and its reverse (783211213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312112387 - 2¹⁵ = 312079619 is a prime.

It is not a weakly prime, because it can be changed into another prime (312112327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156056193 + 156056194.

It is an arithmetic number, because the mean of its divisors is an integer number (156056194).

Almost surely, 2^312112387 is an apocalyptic number.

312112387 is a deficient number, since it is larger than the sum of its proper divisors (1).

312112387 is an equidigital number, since it uses as much as digits as its factorization.

312112387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 312112387 is about 17666.7027766927. The cubic root of 312112387 is about 678.3237164505.

The spelling of 312112387 in words is "three hundred twelve million, one hundred twelve thousand, three hundred eighty-seven".