16805003 has 2 divisors, whose sum is σ = 16805004. Its totient is φ = 16805002.

The previous prime is 16804999. The next prime is 16805011. The reversal of 16805003 is 30050861.

It is a weak prime.

It is an emirp because it is prime and its reverse (30050861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16805003 - 2² = 16804999 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16805003.

It is not a weakly prime, because it can be changed into another prime (16805023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402501 + 8402502.

It is an arithmetic number, because the mean of its divisors is an integer number (8402502).

Almost surely, 2^16805003 is an apocalyptic number.

16805003 is a deficient number, since it is larger than the sum of its proper divisors (1).

16805003 is an equidigital number, since it uses as much as digits as its factorization.

16805003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 16805003 is about 4099.3905644620. The cubic root of 16805003 is about 256.1412540360.

Adding to 16805003 its reverse (30050861), we get a palindrome (46855864).

The spelling of 16805003 in words is "sixteen million, eight hundred five thousand, three".