12729199 has 4 divisors (see below), whose sum is σ = 14547664. Its totient is φ = 10910736.

The previous prime is 12729193. The next prime is 12729217. The reversal of 12729199 is 99192721.

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: 99192721 = 23 ⋅4312727.

It is a cyclic number.

It is not a de Polignac number, because 12729199 - 2¹⁷ = 12598127 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 (12729193) 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, 909222 + ... + 909235.

It is an arithmetic number, because the mean of its divisors is an integer number (3636916).

Almost surely, 2^12729199 is an apocalyptic number.

12729199 is a deficient number, since it is larger than the sum of its proper divisors (1818465).

12729199 is an equidigital number, since it uses as much as digits as its factorization.

12729199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818464.

The product of its digits is 20412, while the sum is 40.

The square root of 12729199 is about 3567.8003027075. The cubic root of 12729199 is about 233.4893226780.

The spelling of 12729199 in words is "twelve million, seven hundred twenty-nine thousand, one hundred ninety-nine".