12320389 has 4 divisors (see below), whose sum is σ = 12745260. Its totient is φ = 11895520.

The previous prime is 12320369. The next prime is 12320401. The reversal of 12320389 is 98302321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6400900 + 5919489 = 2530^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320389 - 2⁹ = 12319877 is a prime.

It is a super-2 number, since 2×12320389² = 303583970222642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320309) 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, 212392 + ... + 212449.

It is an arithmetic number, because the mean of its divisors is an integer number (3186315).

Almost surely, 2^12320389 is an apocalyptic number.

It is an amenable number.

12320389 is a deficient number, since it is larger than the sum of its proper divisors (424871).

12320389 is an equidigital number, since it uses as much as digits as its factorization.

12320389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424870.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12320389 is about 3510.0411678497. The cubic root of 12320389 is about 230.9625008625.

The spelling of 12320389 in words is "twelve million, three hundred twenty thousand, three hundred eighty-nine".