16858989 has 24 divisors (see below), whose sum is σ = 29056320. Its totient is φ = 9632952.

The previous prime is 16858987. The next prime is 16859033. The reversal of 16858989 is 98985861.

It is not a de Polignac number, because 16858989 - 2¹ = 16858987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16858987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5049 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (1210680).

Almost surely, 2^16858989 is an apocalyptic number.

It is an amenable number.

16858989 is a deficient number, since it is larger than the sum of its proper divisors (12197331).

16858989 is a wasteful number, since it uses less digits than its factorization.

16858989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12766 (or 12753 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 16858989 is about 4105.9699219551. The cubic root of 16858989 is about 256.4152450731.

The spelling of 16858989 in words is "sixteen million, eight hundred fifty-eight thousand, nine hundred eighty-nine".