12909099 has 24 divisors (see below), whose sum is σ = 20199888. Its totient is φ = 7311360.

The previous prime is 12909097. The next prime is 12909109. The reversal of 12909099 is 99090921.

It is a happy number.

It is not a de Polignac number, because 12909099 - 2¹ = 12909097 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12909097) 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 23 ways as a sum of consecutive naturals, for example, 19819 + ... + 20459.

It is an arithmetic number, because the mean of its divisors is an integer number (841662).

Almost surely, 2^12909099 is an apocalyptic number.

12909099 is a deficient number, since it is larger than the sum of its proper divisors (7290789).

12909099 is a wasteful number, since it uses less digits than its factorization.

12909099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 12909099 is about 3592.9234614726. The cubic root of 12909099 is about 234.5841385162.

The spelling of 12909099 in words is "twelve million, nine hundred nine thousand, ninety-nine".