16809161 has 8 divisors (see below), whose sum is σ = 17612544. Its totient is φ = 16022160.

The previous prime is 16809103. The next prime is 16809193. The reversal of 16809161 is 16190861.

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

It is a cyclic number.

It is not a de Polignac number, because 16809161 - 2⁶ = 16809097 is a prime.

It is a super-3 number, since 3×16809161³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16809101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970 + ... + 6123.

It is an arithmetic number, because the mean of its divisors is an integer number (2201568).

Almost surely, 2^16809161 is an apocalyptic number.

It is an amenable number.

16809161 is a deficient number, since it is larger than the sum of its proper divisors (803383).

16809161 is an equidigital number, since it uses as much as digits as its factorization.

16809161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 16809161 is about 4099.8976816501. The cubic root of 16809161 is about 256.1623776563.

The spelling of 16809161 in words is "sixteen million, eight hundred nine thousand, one hundred sixty-one".