16809043 has 2 divisors, whose sum is σ = 16809044. Its totient is φ = 16809042.

The previous prime is 16809031. The next prime is 16809047. The reversal of 16809043 is 34090861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16809043 - 2⁵ = 16809011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16808996 and 16809014.

It is not a weakly prime, because it can be changed into another prime (16809047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8404521 + 8404522.

It is an arithmetic number, because the mean of its divisors is an integer number (8404522).

Almost surely, 2^16809043 is an apocalyptic number.

16809043 is a deficient number, since it is larger than the sum of its proper divisors (1).

16809043 is an equidigital number, since it uses as much as digits as its factorization.

16809043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16809043 is about 4099.8832910218. The cubic root of 16809043 is about 256.1617782365.

The spelling of 16809043 in words is "sixteen million, eight hundred nine thousand, forty-three".