16041689 has 4 divisors (see below), whose sum is σ = 16056756. Its totient is φ = 16026624.

The previous prime is 16041673. The next prime is 16041713. The reversal of 16041689 is 98614061.

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 11560000 + 4481689 = 3400^2 + 2117^2 .

It is a cyclic number.

It is not a de Polignac number, because 16041689 - 2⁴ = 16041673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16041889) 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, 5804 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (4014189).

Almost surely, 2^16041689 is an apocalyptic number.

It is an amenable number.

16041689 is a deficient number, since it is larger than the sum of its proper divisors (15067).

16041689 is a wasteful number, since it uses less digits than its factorization.

16041689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15066.

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

The square root of 16041689 is about 4005.2077349371. The cubic root of 16041689 is about 252.2028737108.

The spelling of 16041689 in words is "sixteen million, forty-one thousand, six hundred eighty-nine".