16966989 has 48 divisors (see below), whose sum is σ = 28252224. Its totient is φ = 10108800.

The previous prime is 16966987. The next prime is 16966991. The reversal of 16966989 is 98966961.

It is an interprime number because it is at equal distance from previous prime (16966987) and next prime (16966991).

It is not a de Polignac number, because 16966989 - 2¹ = 16966987 is a prime.

It is a super-2 number, since 2×16966989² = 575757431452242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16966987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129454 + ... + 129584.

It is an arithmetic number, because the mean of its divisors is an integer number (588588).

Almost surely, 2^16966989 is an apocalyptic number.

It is an amenable number.

16966989 is a deficient number, since it is larger than the sum of its proper divisors (11285235).

16966989 is a wasteful number, since it uses less digits than its factorization.

16966989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 188 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 16966989 is about 4119.1005086062. The cubic root of 16966989 is about 256.9616187188.

It can be divided in two parts, 16966 and 989, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 16966989 in words is "sixteen million, nine hundred sixty-six thousand, nine hundred eighty-nine".