16689161 has 2 divisors, whose sum is σ = 16689162. Its totient is φ = 16689160.

The previous prime is 16689157. The next prime is 16689199. The reversal of 16689161 is 16198661.

16689161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (16689199) can be obtained adding 16689161 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 1936 = 4085^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 16689161 - 2² = 16689157 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16689061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344580 + 8344581.

It is an arithmetic number, because the mean of its divisors is an integer number (8344581).

Almost surely, 2^16689161 is an apocalyptic number.

It is an amenable number.

16689161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689161 is an equidigital number, since it uses as much as digits as its factorization.

16689161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 16689161 is about 4085.2369576317. The cubic root of 16689161 is about 255.5513432688.

The spelling of 16689161 in words is "sixteen million, six hundred eighty-nine thousand, one hundred sixty-one".