16369009 has 4 divisors (see below), whose sum is σ = 16593316. Its totient is φ = 16144704.

The previous prime is 16368973. The next prime is 16369039. The reversal of 16369009 is 90096361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90096361 = 2207 ⋅40823.

It can be written as a sum of positive squares in 2 ways, for example, as 4397409 + 11971600 = 2097^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 16369009 - 2¹⁵ = 16336241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16369039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112044 + ... + 112189.

It is an arithmetic number, because the mean of its divisors is an integer number (4148329).

Almost surely, 2^16369009 is an apocalyptic number.

It is an amenable number.

16369009 is a deficient number, since it is larger than the sum of its proper divisors (224307).

16369009 is an equidigital number, since it uses as much as digits as its factorization.

16369009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224306.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 16369009 is about 4045.8631959076. The cubic root of 16369009 is about 253.9066813661.

The spelling of 16369009 in words is "sixteen million, three hundred sixty-nine thousand, nine".