12909999 has 8 divisors (see below), whose sum is σ = 17262720. Its totient is φ = 8581976.

The previous prime is 12909997. The next prime is 12910013. The reversal of 12909999 is 99990921.

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

It is a cyclic number.

It is not a de Polignac number, because 12909999 - 2¹ = 12909997 is a prime.

12909999 is a modest number, since divided by 9999 gives 1290 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4917 + ... + 7070.

It is an arithmetic number, because the mean of its divisors is an integer number (2157840).

Almost surely, 2^12909999 is an apocalyptic number.

12909999 is a deficient number, since it is larger than the sum of its proper divisors (4352721).

12909999 is a wasteful number, since it uses less digits than its factorization.

12909999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12349.

The product of its (nonzero) digits is 118098, while the sum is 48.

The square root of 12909999 is about 3593.0487054867. The cubic root of 12909999 is about 234.5895899893.

The spelling of 12909999 in words is "twelve million, nine hundred nine thousand, nine hundred ninety-nine".