312319 has 4 divisors (see below), whose sum is σ = 356944. Its totient is φ = 267696.

The previous prime is 312313. The next prime is 312331. The reversal of 312319 is 913213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312319 - 2³ = 312311 is a prime.

It is a super-2 number, since 2×312319² = 195086315522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312296 and 312305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22302 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (89236).

2³¹²³¹⁹ is an apocalyptic number.

312319 is a deficient number, since it is larger than the sum of its proper divisors (44625).

312319 is an equidigital number, since it uses as much as digits as its factorization.

312319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44624.

The product of its digits is 162, while the sum is 19.

The square root of 312319 is about 558.8550796047. The cubic root of 312319 is about 67.8473362955.

Adding to 312319 its product of digits (162), we get a square (312481 = 559²).

The spelling of 312319 in words is "three hundred twelve thousand, three hundred nineteen".