409366469 has 4 divisors (see below), whose sum is σ = 409771596. Its totient is φ = 408961344.

The previous prime is 409366453. The next prime is 409366519. The reversal of 409366469 is 964663904.

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 315844 + 409050625 = 562^2 + 20225^2 .

It is a cyclic number.

It is not a de Polignac number, because 409366469 - 2⁴ = 409366453 is a prime.

It is a super-2 number, since 2×409366469² = 335161811883055922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409356469) 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, 201044 + ... + 203069.

It is an arithmetic number, because the mean of its divisors is an integer number (102442899).

Almost surely, 2^409366469 is an apocalyptic number.

It is an amenable number.

409366469 is a deficient number, since it is larger than the sum of its proper divisors (405127).

409366469 is a wasteful number, since it uses less digits than its factorization.

409366469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405126.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 409366469 is about 20232.8067504239. The cubic root of 409366469 is about 742.5130465876.

The spelling of 409366469 in words is "four hundred nine million, three hundred sixty-six thousand, four hundred sixty-nine".