12899989 has 8 divisors (see below), whose sum is σ = 13132160. Its totient is φ = 12669696.

The previous prime is 12899977. The next prime is 12900001. The reversal of 12899989 is 98999821.

12899989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12899977) and next prime (12900001).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12899989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899959) 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, 22069 + ... + 22645.

It is an arithmetic number, because the mean of its divisors is an integer number (1641520).

Almost surely, 2^12899989 is an apocalyptic number.

It is an amenable number.

12899989 is a deficient number, since it is larger than the sum of its proper divisors (232171).

12899989 is an equidigital number, since it uses as much as digits as its factorization.

12899989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 839808, while the sum is 55.

The square root of 12899989 is about 3591.6554678866. The cubic root of 12899989 is about 234.5289432257.

The spelling of 12899989 in words is "twelve million, eight hundred ninety-nine thousand, nine hundred eighty-nine".