16989343 has 8 divisors (see below), whose sum is σ = 19868288. Its totient is φ = 14223384.

The previous prime is 16989337. The next prime is 16989347. The reversal of 16989343 is 34398961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16989343 - 2²¹ = 14892191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16989343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16989347) 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 7 ways as a sum of consecutive naturals, for example, 27921 + ... + 28522.

It is an arithmetic number, because the mean of its divisors is an integer number (2483536).

Almost surely, 2^16989343 is an apocalyptic number.

16989343 is a deficient number, since it is larger than the sum of its proper divisors (2878945).

16989343 is an equidigital number, since it uses as much as digits as its factorization.

16989343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56493.

The product of its digits is 139968, while the sum is 43.

The square root of 16989343 is about 4121.8130719381. The cubic root of 16989343 is about 257.0744181327.

The spelling of 16989343 in words is "sixteen million, nine hundred eighty-nine thousand, three hundred forty-three".