16182009 has 6 divisors (see below), whose sum is σ = 23374026. Its totient is φ = 10788000.

The previous prime is 16182007. The next prime is 16182043. The reversal of 16182009 is 90028161.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 21609 = 4020^2 + 147^2 .

It is not a de Polignac number, because 16182009 - 2¹ = 16182007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16182007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 898992 + ... + 899009.

It is an arithmetic number, because the mean of its divisors is an integer number (3895671).

Almost surely, 2^16182009 is an apocalyptic number.

It is an amenable number.

16182009 is a deficient number, since it is larger than the sum of its proper divisors (7192017).

16182009 is a wasteful number, since it uses less digits than its factorization.

16182009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798007 (or 1798004 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 16182009 is about 4022.6867887023. The cubic root of 16182009 is about 252.9360970114.

The spelling of 16182009 in words is "sixteen million, one hundred eighty-two thousand, nine".