12802991 has 4 divisors (see below), whose sum is σ = 12856800. Its totient is φ = 12749184.

The previous prime is 12802987. The next prime is 12803009. The reversal of 12802991 is 19920821.

It is a happy number.

12802991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19920821 = 17 ⋅1171813.

It is a cyclic number.

It is not a de Polignac number, because 12802991 - 2² = 12802987 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 (12802901) 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, 26546 + ... + 27023.

It is an arithmetic number, because the mean of its divisors is an integer number (3214200).

Almost surely, 2^12802991 is an apocalyptic number.

12802991 is a deficient number, since it is larger than the sum of its proper divisors (53809).

12802991 is an equidigital number, since it uses as much as digits as its factorization.

12802991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53808.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12802991 is about 3578.1267445411. The cubic root of 12802991 is about 233.9396379236.

The spelling of 12802991 in words is "twelve million, eight hundred two thousand, nine hundred ninety-one".