16736409 has 8 divisors (see below), whose sum is σ = 24794720. Its totient is φ = 11157588.

The previous prime is 16736389. The next prime is 16736411. The reversal of 16736409 is 90463761.

16736409 is a `hidden beast` number, since 1 + 6 + 7 + 3 + 640 + 9 = 666.

It is not a de Polignac number, because 16736409 - 2¹⁹ = 16212121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16736459) 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, 309907 + ... + 309960.

It is an arithmetic number, because the mean of its divisors is an integer number (3099340).

Almost surely, 2^16736409 is an apocalyptic number.

It is an amenable number.

16736409 is a deficient number, since it is larger than the sum of its proper divisors (8058311).

16736409 is an equidigital number, since it uses as much as digits as its factorization.

16736409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619876 (or 619870 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 16736409 is about 4091.0156440669. The cubic root of 16736409 is about 255.7922763593.

The spelling of 16736409 in words is "sixteen million, seven hundred thirty-six thousand, four hundred nine".