12189799 has 4 divisors (see below), whose sum is σ = 12906864. Its totient is φ = 11472736.

The previous prime is 12189781. The next prime is 12189803. The reversal of 12189799 is 99798121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99798121 = 83 ⋅1202387.

It is a cyclic number.

It is not a de Polignac number, because 12189799 - 2¹³ = 12181607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189299) 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, 358507 + ... + 358540.

It is an arithmetic number, because the mean of its divisors is an integer number (3226716).

Almost surely, 2^12189799 is an apocalyptic number.

12189799 is a deficient number, since it is larger than the sum of its proper divisors (717065).

12189799 is an equidigital number, since it uses as much as digits as its factorization.

12189799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717064.

The product of its digits is 81648, while the sum is 46.

The square root of 12189799 is about 3491.3892650348. The cubic root of 12189799 is about 230.1435713564.

The spelling of 12189799 in words is "twelve million, one hundred eighty-nine thousand, seven hundred ninety-nine".