16389609 has 8 divisors (see below), whose sum is σ = 23003040. Its totient is φ = 10351296.

The previous prime is 16389599. The next prime is 16389613. The reversal of 16389609 is 90698361.

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

It is not a de Polignac number, because 16389609 - 2⁷ = 16389481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16389679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143712 + ... + 143825.

It is an arithmetic number, because the mean of its divisors is an integer number (2875380).

Almost surely, 2^16389609 is an apocalyptic number.

16389609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16389609 is a deficient number, since it is larger than the sum of its proper divisors (6613431).

16389609 is a wasteful number, since it uses less digits than its factorization.

16389609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287559.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 16389609 is about 4048.4082057026. The cubic root of 16389609 is about 254.0131485123.

The spelling of 16389609 in words is "sixteen million, three hundred eighty-nine thousand, six hundred nine".