16396609 has 8 divisors (see below), whose sum is σ = 16620968. Its totient is φ = 16174080.

The previous prime is 16396591. The next prime is 16396621. The reversal of 16396609 is 90669361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1404225 + 14992384 = 1185^2 + 3872^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16396609 - 2⁷ = 16396481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16393609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28129 + ... + 28705.

It is an arithmetic number, because the mean of its divisors is an integer number (2077621).

Almost surely, 2^16396609 is an apocalyptic number.

It is an amenable number.

16396609 is a deficient number, since it is larger than the sum of its proper divisors (224359).

16396609 is a wasteful number, since it uses less digits than its factorization.

16396609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 16396609 is about 4049.2726507362. The cubic root of 16396609 is about 254.0493063600.

The spelling of 16396609 in words is "sixteen million, three hundred ninety-six thousand, six hundred nine".