12109998 has 8 divisors (see below), whose sum is σ = 24220008. Its totient is φ = 4036664.

The previous prime is 12109991. The next prime is 12110003. The reversal of 12109998 is 89990121.

It is a happy number.

12109998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12109998 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12109991) 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, 1009161 + ... + 1009172.

It is an arithmetic number, because the mean of its divisors is an integer number (3027501).

Almost surely, 2^12109998 is an apocalyptic number.

12109998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12109998 is a wasteful number, since it uses less digits than its factorization.

12109998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018338.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 12109998 is about 3479.9422409000. The cubic root of 12109998 is about 229.6402567743.

The spelling of 12109998 in words is "twelve million, one hundred nine thousand, nine hundred ninety-eight".