16805903 has 2 divisors, whose sum is σ = 16805904. Its totient is φ = 16805902.

The previous prime is 16805891. The next prime is 16805933. The reversal of 16805903 is 30950861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16805903 - 2⁶ = 16805839 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 16805903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16805933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402951 + 8402952.

It is an arithmetic number, because the mean of its divisors is an integer number (8402952).

Almost surely, 2^16805903 is an apocalyptic number.

16805903 is a deficient number, since it is larger than the sum of its proper divisors (1).

16805903 is an equidigital number, since it uses as much as digits as its factorization.

16805903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 16805903 is about 4099.5003354067. The cubic root of 16805903 is about 256.1458265436.

The spelling of 16805903 in words is "sixteen million, eight hundred five thousand, nine hundred three".