312723 has 6 divisors (see below), whose sum is σ = 451724. Its totient is φ = 208476.

The previous prime is 312709. The next prime is 312727. The reversal of 312723 is 327213.

It is not a de Polignac number, because 312723 - 2⁹ = 312211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312696 and 312705.

It is not an unprimeable number, because it can be changed into a prime (312727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17365 + ... + 17382.

2³¹²⁷²³ is an apocalyptic number.

312723 is a deficient number, since it is larger than the sum of its proper divisors (139001).

312723 is a wasteful number, since it uses less digits than its factorization.

312723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34753 (or 34750 counting only the distinct ones).

The product of its digits is 252, while the sum is 18.

The square root of 312723 is about 559.2164160681. The cubic root of 312723 is about 67.8765783136.

Adding to 312723 its reverse (327213), we get a palindrome (639936).

It can be divided in two parts, 312 and 723, that added together give a triangular number (1035 = T₄₅).

The spelling of 312723 in words is "three hundred twelve thousand, seven hundred twenty-three", and thus it is an iban number.