312371893 has 2 divisors, whose sum is σ = 312371894. Its totient is φ = 312371892.

The previous prime is 312371863. The next prime is 312371921. The reversal of 312371893 is 398173213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310006449 + 2365444 = 17607^2 + 1538^2 .

It is an emirp because it is prime and its reverse (398173213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312371893 - 2⁵ = 312371861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312371833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156185946 + 156185947.

It is an arithmetic number, because the mean of its divisors is an integer number (156185947).

Almost surely, 2^312371893 is an apocalyptic number.

It is an amenable number.

312371893 is a deficient number, since it is larger than the sum of its proper divisors (1).

312371893 is an equidigital number, since it uses as much as digits as its factorization.

312371893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 312371893 is about 17674.0457451032. The cubic root of 312371893 is about 678.5116619019.

The spelling of 312371893 in words is "three hundred twelve million, three hundred seventy-one thousand, eight hundred ninety-three".