16974809 has 16 divisors (see below), whose sum is σ = 18585600. Its totient is φ = 15449616.

The previous prime is 16974799. The next prime is 16974817. The reversal of 16974809 is 90847961.

It is a cyclic number.

It is not a de Polignac number, because 16974809 - 2⁸ = 16974553 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16974809.

It is not an unprimeable number, because it can be changed into a prime (16974829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64412 + ... + 64674.

It is an arithmetic number, because the mean of its divisors is an integer number (1161600).

Almost surely, 2^16974809 is an apocalyptic number.

16974809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16974809 is a deficient number, since it is larger than the sum of its proper divisors (1610791).

16974809 is a wasteful number, since it uses less digits than its factorization.

16974809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16974809 is about 4120.0496356233. The cubic root of 16974809 is about 257.0010900952.

The spelling of 16974809 in words is "sixteen million, nine hundred seventy-four thousand, eight hundred nine".