312887 has 2 divisors, whose sum is σ = 312888. Its totient is φ = 312886.

The previous prime is 312863. The next prime is 312899. The reversal of 312887 is 788213.

It is a strong prime.

It is an emirp because it is prime and its reverse (788213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312887 - 2¹⁴ = 296503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156443 + 156444.

It is an arithmetic number, because the mean of its divisors is an integer number (156444).

2³¹²⁸⁸⁷ is an apocalyptic number.

312887 is a deficient number, since it is larger than the sum of its proper divisors (1).

312887 is an equidigital number, since it uses as much as digits as its factorization.

312887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 312887 is about 559.3630305982. The cubic root of 312887 is about 67.8884416489. Note that the first 3 decimals are identical.

The spelling of 312887 in words is "three hundred twelve thousand, eight hundred eighty-seven".