16692161 has 4 divisors (see below), whose sum is σ = 16702932. Its totient is φ = 16681392.

The previous prime is 16692157. The next prime is 16692163. The reversal of 16692161 is 16129661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 10660225 = 2456^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 16692161 - 2² = 16692157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16692163) 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, 2570 + ... + 6323.

It is an arithmetic number, because the mean of its divisors is an integer number (4175733).

Almost surely, 2^16692161 is an apocalyptic number.

It is an amenable number.

16692161 is a deficient number, since it is larger than the sum of its proper divisors (10771).

16692161 is an equidigital number, since it uses as much as digits as its factorization.

16692161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10770.

The product of its digits is 3888, while the sum is 32.

The square root of 16692161 is about 4085.6041168963. The cubic root of 16692161 is about 255.5666547654.

Subtracting from 16692161 its reverse (16129661), we obtain a square (562500 = 750²).

The spelling of 16692161 in words is "sixteen million, six hundred ninety-two thousand, one hundred sixty-one".