312647 has 8 divisors (see below), whose sum is σ = 338256. Its totient is φ = 287872.

The previous prime is 312643. The next prime is 312673. The reversal of 312647 is 746213.

312647 is nontrivially palindromic in base 13.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312647 - 2² = 312643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312647.

It is not an unprimeable number, because it can be changed into a prime (312643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728 + ... + 1074.

It is an arithmetic number, because the mean of its divisors is an integer number (42282).

2³¹²⁶⁴⁷ is an apocalyptic number.

312647 is a deficient number, since it is larger than the sum of its proper divisors (25609).

312647 is a wasteful number, since it uses less digits than its factorization.

312647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417.

The product of its digits is 1008, while the sum is 23.

The square root of 312647 is about 559.1484597135. The cubic root of 312647 is about 67.8710792639.

It can be divided in two parts, 312 and 647, that added together give a palindrome (959).

The spelling of 312647 in words is "three hundred twelve thousand, six hundred forty-seven".