16899989 has 16 divisors (see below), whose sum is σ = 18659520. Its totient is φ = 15240960.

The previous prime is 16899973. The next prime is 16900021. The reversal of 16899989 is 98999861.

It is a cyclic number.

It is not a de Polignac number, because 16899989 - 2⁴ = 16899973 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 (16899959) 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 15 ways as a sum of consecutive naturals, for example, 44402 + ... + 44780.

It is an arithmetic number, because the mean of its divisors is an integer number (1166220).

Almost surely, 2^16899989 is an apocalyptic number.

It is an amenable number.

16899989 is a deficient number, since it is larger than the sum of its proper divisors (1759531).

16899989 is a wasteful number, since it uses less digits than its factorization.

16899989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its digits is 2519424, while the sum is 59.

The square root of 16899989 is about 4110.9596203320. The cubic root of 16899989 is about 256.6229387097.

The spelling of 16899989 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred eighty-nine".