12909199 has 4 divisors (see below), whose sum is σ = 12938400. Its totient is φ = 12880000.

The previous prime is 12909179. The next prime is 12909217. The reversal of 12909199 is 99190921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12909199 - 2¹¹ = 12907151 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909109) 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, 13927 + ... + 14824.

It is an arithmetic number, because the mean of its divisors is an integer number (3234600).

Almost surely, 2^12909199 is an apocalyptic number.

12909199 is a deficient number, since it is larger than the sum of its proper divisors (29201).

12909199 is an equidigital number, since it uses as much as digits as its factorization.

12909199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29200.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 12909199 is about 3592.9373776897. The cubic root of 12909199 is about 234.5847442480.

The spelling of 12909199 in words is "twelve million, nine hundred nine thousand, one hundred ninety-nine".