12390389 has 4 divisors (see below), whose sum is σ = 13516800. Its totient is φ = 11263980.

The previous prime is 12390379. The next prime is 12390401. The reversal of 12390389 is 98309321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98309321 = 11 ⋅8937211.

It is a cyclic number.

It is not a de Polignac number, because 12390389 - 2¹² = 12386293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390349) 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, 563189 + ... + 563210.

It is an arithmetic number, because the mean of its divisors is an integer number (3379200).

Almost surely, 2^12390389 is an apocalyptic number.

It is an amenable number.

12390389 is a deficient number, since it is larger than the sum of its proper divisors (1126411).

12390389 is a wasteful number, since it uses less digits than its factorization.

12390389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126410.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 12390389 is about 3519.9984374997. The cubic root of 12390389 is about 231.3990902235.

The spelling of 12390389 in words is "twelve million, three hundred ninety thousand, three hundred eighty-nine".