312947 has 4 divisors (see below), whose sum is σ = 314160. Its totient is φ = 311736.

The previous prime is 312943. The next prime is 312967. The reversal of 312947 is 749213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 749213 = 37 ⋅20249.

It is a cyclic number.

It is not a de Polignac number, because 312947 - 2² = 312943 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312947.

It is not an unprimeable number, because it can be changed into a prime (312941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (78540).

2³¹²⁹⁴⁷ is an apocalyptic number.

312947 is a deficient number, since it is larger than the sum of its proper divisors (1213).

312947 is an equidigital number, since it uses as much as digits as its factorization.

312947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212.

The product of its digits is 1512, while the sum is 26.

The square root of 312947 is about 559.4166604598. The cubic root of 312947 is about 67.8927808578.

The spelling of 312947 in words is "three hundred twelve thousand, nine hundred forty-seven".