16800891 has 4 divisors (see below), whose sum is σ = 22401192. Its totient is φ = 11200592.

The previous prime is 16800887. The next prime is 16800911. The reversal of 16800891 is 19800861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16800891 - 2² = 16800887 is a prime.

16800891 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (16800821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800146 + ... + 2800151.

It is an arithmetic number, because the mean of its divisors is an integer number (5600298).

Almost surely, 2^16800891 is an apocalyptic number.

16800891 is a deficient number, since it is larger than the sum of its proper divisors (5600301).

16800891 is an equidigital number, since it uses as much as digits as its factorization.

16800891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600300.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 16800891 is about 4098.8889958134. Note that the first 3 decimals coincide. The cubic root of 16800891 is about 256.1203606795.

The spelling of 16800891 in words is "sixteen million, eight hundred thousand, eight hundred ninety-one".