16805901 has 8 divisors (see below), whose sum is σ = 25609024. Its totient is φ = 9603360.

The previous prime is 16805891. The next prime is 16805903. The reversal of 16805901 is 10950861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16805901 - 2⁵ = 16805869 is a prime.

It is the 4100-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16805903) by changing a digit.

It is a nontrivial repunit in base 4099.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400120 + ... + 400161.

It is an arithmetic number, because the mean of its divisors is an integer number (3201128).

Almost surely, 2^16805901 is an apocalyptic number.

It is an amenable number.

16805901 is a deficient number, since it is larger than the sum of its proper divisors (8803123).

16805901 is an equidigital number, since it uses as much as digits as its factorization.

16805901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800291.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 16805901 is about 4099.5000914746. The cubic root of 16805901 is about 256.1458163827.

The spelling of 16805901 in words is "sixteen million, eight hundred five thousand, nine hundred one".