16897805 has 8 divisors (see below), whose sum is σ = 20478744. Its totient is φ = 13384000.

The previous prime is 16897799. The next prime is 16897817. The reversal of 16897805 is 50879861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5621641 + 11276164 = 2371^2 + 3358^2 .

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

It is not a de Polignac number, because 16897805 - 2¹⁶ = 16832269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16226 + ... + 17235.

It is an arithmetic number, because the mean of its divisors is an integer number (2559843).

Almost surely, 2^16897805 is an apocalyptic number.

It is an amenable number.

16897805 is a deficient number, since it is larger than the sum of its proper divisors (3580939).

16897805 is a wasteful number, since it uses less digits than its factorization.

16897805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33567.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 16897805 is about 4110.6939803396. The cubic root of 16897805 is about 256.6118836997.

The spelling of 16897805 in words is "sixteen million, eight hundred ninety-seven thousand, eight hundred five".