16689041 has 4 divisors (see below), whose sum is σ = 16917732. Its totient is φ = 16460352.

The previous prime is 16688999. The next prime is 16689061. The reversal of 16689041 is 14098661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7447441 + 9241600 = 2729^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 16689041 - 2⁶ = 16688977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16688992 and 16689010.

It is not an unprimeable number, because it can be changed into a prime (16689061) 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, 114236 + ... + 114381.

It is an arithmetic number, because the mean of its divisors is an integer number (4229433).

Almost surely, 2^16689041 is an apocalyptic number.

It is an amenable number.

16689041 is a deficient number, since it is larger than the sum of its proper divisors (228691).

16689041 is an equidigital number, since it uses as much as digits as its factorization.

16689041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228690.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 16689041 is about 4085.2222705748. Note that the first 4 decimals coincide. The cubic root of 16689041 is about 255.5507307708.

The spelling of 16689041 in words is "sixteen million, six hundred eighty-nine thousand, forty-one".