16805459 has 4 divisors (see below), whose sum is σ = 18333240. Its totient is φ = 15277680.

The previous prime is 16805447. The next prime is 16805513. The reversal of 16805459 is 95450861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16805459 - 2¹² = 16801363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16805419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763874 + ... + 763895.

It is an arithmetic number, because the mean of its divisors is an integer number (4583310).

Almost surely, 2^16805459 is an apocalyptic number.

16805459 is a deficient number, since it is larger than the sum of its proper divisors (1527781).

16805459 is a wasteful number, since it uses less digits than its factorization.

16805459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527780.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 16805459 is about 4099.4461821080. The cubic root of 16805459 is about 256.1435707936.

The spelling of 16805459 in words is "sixteen million, eight hundred five thousand, four hundred fifty-nine".