16689061 has 2 divisors, whose sum is σ = 16689062. Its totient is φ = 16689060.

The previous prime is 16688999. The next prime is 16689073. The reversal of 16689061 is 16098661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 164836 = 4065^2 + 406^2 .

It is an emirp because it is prime and its reverse (16098661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 19068991 and 19986091.

It is a cyclic number.

It is not a de Polignac number, because 16689061 - 2²¹ = 14591909 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16689061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16689161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344530 + 8344531.

It is an arithmetic number, because the mean of its divisors is an integer number (8344531).

Almost surely, 2^16689061 is an apocalyptic number.

It is an amenable number.

16689061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689061 is an equidigital number, since it uses as much as digits as its factorization.

16689061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16689061 is about 4085.2247184213. The cubic root of 16689061 is about 255.5508328540.

The spelling of 16689061 in words is "sixteen million, six hundred eighty-nine thousand, sixty-one".