12891799 has 8 divisors (see below), whose sum is σ = 13816800. Its totient is φ = 11997216.

The previous prime is 12891761. The next prime is 12891803. The reversal of 12891799 is 99719821.

It is a happy number.

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 12891799 - 2¹⁵ = 12859031 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 (12892799) 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 7 ways as a sum of consecutive naturals, for example, 6724 + ... + 8425.

It is an arithmetic number, because the mean of its divisors is an integer number (1727100).

Almost surely, 2^12891799 is an apocalyptic number.

12891799 is a deficient number, since it is larger than the sum of its proper divisors (925001).

12891799 is a wasteful number, since it uses less digits than its factorization.

12891799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15209.

The product of its digits is 81648, while the sum is 46.

The square root of 12891799 is about 3590.5151440984. The cubic root of 12891799 is about 234.4792998065.

The spelling of 12891799 in words is "twelve million, eight hundred ninety-one thousand, seven hundred ninety-nine".