12213889 has 4 divisors (see below), whose sum is σ = 12223024. Its totient is φ = 12204756.

The previous prime is 12213881. The next prime is 12213893. The reversal of 12213889 is 98831221.

12213889 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12213889 - 2³ = 12213881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213881) 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, 2127 + ... + 5380.

It is an arithmetic number, because the mean of its divisors is an integer number (3055756).

Almost surely, 2^12213889 is an apocalyptic number.

It is an amenable number.

12213889 is a deficient number, since it is larger than the sum of its proper divisors (9135).

12213889 is an equidigital number, since it uses as much as digits as its factorization.

12213889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134.

The product of its digits is 6912, while the sum is 34.

The square root of 12213889 is about 3494.8374783386. The cubic root of 12213889 is about 230.2950781050.

The spelling of 12213889 in words is "twelve million, two hundred thirteen thousand, eight hundred eighty-nine".