12312319 has 4 divisors (see below), whose sum is σ = 12598696. Its totient is φ = 12025944.

The previous prime is 12312283. The next prime is 12312331. The reversal of 12312319 is 91321321.

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 12312319 - 2⁷ = 12312191 is a prime.

It is a super-2 number, since 2×12312319² = 303186398315522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12312319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312359) 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, 143124 + ... + 143209.

It is an arithmetic number, because the mean of its divisors is an integer number (3149674).

Almost surely, 2^12312319 is an apocalyptic number.

12312319 is a deficient number, since it is larger than the sum of its proper divisors (286377).

12312319 is an equidigital number, since it uses as much as digits as its factorization.

12312319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286376.

The product of its digits is 324, while the sum is 22.

The square root of 12312319 is about 3508.8914203777. The cubic root of 12312319 is about 230.9120621282.

The spelling of 12312319 in words is "twelve million, three hundred twelve thousand, three hundred nineteen".