12409199 has 4 divisors (see below), whose sum is σ = 13537320. Its totient is φ = 11281080.

The previous prime is 12409193. The next prime is 12409217. The reversal of 12409199 is 99190421.

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 12409199 - 2²⁰ = 11360623 is a prime.

It is a super-4 number, since 4×12409199⁴ (a number of 29 digits) contains 4444 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 (12409193) 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, 564044 + ... + 564065.

It is an arithmetic number, because the mean of its divisors is an integer number (3384330).

Almost surely, 2^12409199 is an apocalyptic number.

12409199 is a deficient number, since it is larger than the sum of its proper divisors (1128121).

12409199 is a wasteful number, since it uses less digits than its factorization.

12409199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128120.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 12409199 is about 3522.6693004027. The cubic root of 12409199 is about 231.5161276077.

The spelling of 12409199 in words is "twelve million, four hundred nine thousand, one hundred ninety-nine".