12389873 has 4 divisors (see below), whose sum is σ = 12817140. Its totient is φ = 11962608.

The previous prime is 12389833. The next prime is 12389879. The reversal of 12389873 is 37898321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37898321 = 17 ⋅2229313.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 4255969 = 2852^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 12389873 - 2²² = 8195569 is a prime.

It is a super-2 number, since 2×12389873² = 307017905912258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12389873.

It is not an unprimeable number, because it can be changed into a prime (12389879) 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, 213590 + ... + 213647.

It is an arithmetic number, because the mean of its divisors is an integer number (3204285).

Almost surely, 2^12389873 is an apocalyptic number.

It is an amenable number.

12389873 is a deficient number, since it is larger than the sum of its proper divisors (427267).

12389873 is an equidigital number, since it uses as much as digits as its factorization.

12389873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427266.

The product of its digits is 72576, while the sum is 41.

The square root of 12389873 is about 3519.9251412495. The cubic root of 12389873 is about 231.3958779598.

It can be divided in two parts, 1238 and 9873, that added together give a palindrome (11111).

The spelling of 12389873 in words is "twelve million, three hundred eighty-nine thousand, eight hundred seventy-three".