12219989 has 8 divisors (see below), whose sum is σ = 12400128. Its totient is φ = 12041440.

The previous prime is 12219973. The next prime is 12219997. The reversal of 12219989 is 98991221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12219989 - 2⁴ = 12219973 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12219919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25934 + ... + 26400.

It is an arithmetic number, because the mean of its divisors is an integer number (1550016).

Almost surely, 2^12219989 is an apocalyptic number.

It is an amenable number.

12219989 is a deficient number, since it is larger than the sum of its proper divisors (180139).

12219989 is a wasteful number, since it uses less digits than its factorization.

12219989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its digits is 23328, while the sum is 41.

The square root of 12219989 is about 3495.7100852330. The cubic root of 12219989 is about 230.3334105906. Note that the first 3 decimals are identical.

The spelling of 12219989 in words is "twelve million, two hundred nineteen thousand, nine hundred eighty-nine".