16143909 has 8 divisors (see below), whose sum is σ = 21828672. Its totient is φ = 10610880.

The previous prime is 16143899. The next prime is 16143913. The reversal of 16143909 is 90934161.

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

It is not a de Polignac number, because 16143909 - 2⁹ = 16143397 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16143909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16143929) 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, 37684 + ... + 38109.

It is an arithmetic number, because the mean of its divisors is an integer number (2728584).

Almost surely, 2^16143909 is an apocalyptic number.

It is an amenable number.

16143909 is a deficient number, since it is larger than the sum of its proper divisors (5684763).

16143909 is an equidigital number, since it uses as much as digits as its factorization.

16143909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75867.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 16143909 is about 4017.9483570599. The cubic root of 16143909 is about 252.7374311468.

The spelling of 16143909 in words is "sixteen million, one hundred forty-three thousand, nine hundred nine".