409667 has 4 divisors (see below), whose sum is σ = 414360. Its totient is φ = 404976.

The previous prime is 409657. The next prime is 409691. The reversal of 409667 is 766904.

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

It is a cyclic number.

It is not a de Polignac number, because 409667 - 2¹⁰ = 408643 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 409667.

It is not an unprimeable number, because it can be changed into a prime (409657) 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, 2213 + ... + 2390.

It is an arithmetic number, because the mean of its divisors is an integer number (103590).

2⁴⁰⁹⁶⁶⁷ is an apocalyptic number.

409667 is a deficient number, since it is larger than the sum of its proper divisors (4693).

409667 is an equidigital number, since it uses as much as digits as its factorization.

409667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 409667 is about 640.0523416097. The cubic root of 409667 is about 74.2694704198.

The spelling of 409667 in words is "four hundred nine thousand, six hundred sixty-seven".