16681959 has 12 divisors (see below), whose sum is σ = 27538576. Its totient is φ = 9532512.

The previous prime is 16681949. The next prime is 16681991. The reversal of 16681959 is 95918661.

It is not a de Polignac number, because 16681959 - 2⁵ = 16681927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132334 + ... + 132459.

Almost surely, 2^16681959 is an apocalyptic number.

16681959 is a deficient number, since it is larger than the sum of its proper divisors (10856617).

16681959 is a wasteful number, since it uses less digits than its factorization.

16681959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264806 (or 264803 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 16681959 is about 4084.3553958979. The cubic root of 16681959 is about 255.5145779778.

The spelling of 16681959 in words is "sixteen million, six hundred eighty-one thousand, nine hundred fifty-nine".