312047893 has 2 divisors, whose sum is σ = 312047894. Its totient is φ = 312047892.

The previous prime is 312047839. The next prime is 312047909. The reversal of 312047893 is 398740213.

Together with previous prime (312047839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167495364 + 144552529 = 12942^2 + 12023^2 .

It is a cyclic number.

It is not a de Polignac number, because 312047893 - 2¹³ = 312039701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312047293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156023946 + 156023947.

It is an arithmetic number, because the mean of its divisors is an integer number (156023947).

Almost surely, 2^312047893 is an apocalyptic number.

It is an amenable number.

312047893 is a deficient number, since it is larger than the sum of its proper divisors (1).

312047893 is an equidigital number, since it uses as much as digits as its factorization.

312047893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 312047893 is about 17664.8773842334. The cubic root of 312047893 is about 678.2769909490.

The spelling of 312047893 in words is "three hundred twelve million, forty-seven thousand, eight hundred ninety-three".