12199999 has 16 divisors (see below), whose sum is σ = 14879808. Its totient is φ = 9764352.

The previous prime is 12199997. The next prime is 12200009. The reversal of 12199999 is 99999121.

It is a cyclic number.

It is not a de Polignac number, because 12199999 - 2¹ = 12199997 is a prime.

It is a Duffinian number.

12199999 is a modest number, since divided by 9999 gives 1219 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12199991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18357 + ... + 19009.

It is an arithmetic number, because the mean of its divisors is an integer number (929988).

Almost surely, 2^12199999 is an apocalyptic number.

12199999 is a deficient number, since it is larger than the sum of its proper divisors (2679809).

12199999 is a wasteful number, since it uses less digits than its factorization.

12199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its digits is 118098, while the sum is 49.

The square root of 12199999 is about 3492.8496961650. The cubic root of 12199999 is about 230.2077455065.

The spelling of 12199999 in words is "twelve million, one hundred ninety-nine thousand, nine hundred ninety-nine".