12087389 has 4 divisors (see below), whose sum is σ = 12292320. Its totient is φ = 11882460.

The previous prime is 12087379. The next prime is 12087409. The reversal of 12087389 is 98378021.

12087389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 98378021 = 7 ⋅14054003.

It is a cyclic number.

It is not a de Polignac number, because 12087389 - 2¹² = 12083293 is a prime.

It is a super-2 number, since 2×12087389² = 292209945674642, 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 (12087349) 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, 102377 + ... + 102494.

It is an arithmetic number, because the mean of its divisors is an integer number (3073080).

Almost surely, 2^12087389 is an apocalyptic number.

It is an amenable number.

12087389 is a deficient number, since it is larger than the sum of its proper divisors (204931).

12087389 is an equidigital number, since it uses as much as digits as its factorization.

12087389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204930.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 12087389 is about 3476.6922498260. The cubic root of 12087389 is about 229.4972572741.

The spelling of 12087389 in words is "twelve million, eighty-seven thousand, three hundred eighty-nine".