12189967 has 8 divisors (see below), whose sum is σ = 12499200. Its totient is φ = 11882904.

The previous prime is 12189959. The next prime is 12189979. The reversal of 12189967 is 76998121.

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 12189967 - 2³ = 12189959 is a prime.

It is a super-2 number, since 2×12189967² = 297190590922178, 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 (12189907) 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, 19384 + ... + 20002.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^12189967 is an apocalyptic number.

12189967 is a deficient number, since it is larger than the sum of its proper divisors (309233).

12189967 is an equidigital number, since it uses as much as digits as its factorization.

12189967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

The product of its digits is 54432, while the sum is 43.

The square root of 12189967 is about 3491.4133241425. The cubic root of 12189967 is about 230.1446286323.

The spelling of 12189967 in words is "twelve million, one hundred eighty-nine thousand, nine hundred sixty-seven".