16326009 has 16 divisors (see below), whose sum is σ = 27642240. Its totient is φ = 9329040.

The previous prime is 16326007. The next prime is 16326041. The reversal of 16326009 is 90062361.

It is a happy number.

It is not a de Polignac number, because 16326009 - 2¹ = 16326007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16326007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43002 + ... + 43379.

It is an arithmetic number, because the mean of its divisors is an integer number (1727640).

Almost surely, 2^16326009 is an apocalyptic number.

It is an amenable number.

16326009 is a deficient number, since it is larger than the sum of its proper divisors (11316231).

16326009 is an equidigital number, since it uses as much as digits as its factorization.

16326009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86397 (or 86391 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 16326009 is about 4040.5456314711. The cubic root of 16326009 is about 253.6841559526.

The spelling of 16326009 in words is "sixteen million, three hundred twenty-six thousand, nine".