12189719 has 4 divisors (see below), whose sum is σ = 12202680. Its totient is φ = 12176760.

The previous prime is 12189703. The next prime is 12189733. The reversal of 12189719 is 91798121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91798121 = 3539 ⋅25939.

It is a cyclic number.

It is not a de Polignac number, because 12189719 - 2⁴ = 12189703 is a prime.

It is a super-2 number, since 2×12189719² = 297178498597922, 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 (12180719) 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, 4949 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (3050670).

Almost surely, 2^12189719 is an apocalyptic number.

12189719 is a deficient number, since it is larger than the sum of its proper divisors (12961).

12189719 is a wasteful number, since it uses less digits than its factorization.

12189719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960.

The product of its digits is 9072, while the sum is 38.

The square root of 12189719 is about 3491.3778082585. The cubic root of 12189719 is about 230.1430678882.

The spelling of 12189719 in words is "twelve million, one hundred eighty-nine thousand, seven hundred nineteen".