200409409 has 4 divisors (see below), whose sum is σ = 200638804. Its totient is φ = 200180016.

The previous prime is 200409403. The next prime is 200409467. The reversal of 200409409 is 904904002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111767184 + 88642225 = 10572^2 + 9415^2 .

It is a cyclic number.

It is not a de Polignac number, because 200409409 - 2¹⁹ = 199885121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200409403) 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 3 ways as a sum of consecutive naturals, for example, 113382 + ... + 115135.

It is an arithmetic number, because the mean of its divisors is an integer number (50159701).

Almost surely, 2^200409409 is an apocalyptic number.

It is an amenable number.

200409409 is a deficient number, since it is larger than the sum of its proper divisors (229395).

200409409 is an equidigital number, since it uses as much as digits as its factorization.

200409409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229394.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 200409409 is about 14156.6030176734. The cubic root of 200409409 is about 585.2023153938.

The spelling of 200409409 in words is "two hundred million, four hundred nine thousand, four hundred nine".