409867 has 2 divisors, whose sum is σ = 409868. Its totient is φ = 409866.

The previous prime is 409861. The next prime is 409879. The reversal of 409867 is 768904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409867 - 2¹⁵ = 377099 is a prime.

It is not a weakly prime, because it can be changed into another prime (409861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204933 + 204934.

It is an arithmetic number, because the mean of its divisors is an integer number (204934).

2⁴⁰⁹⁸⁶⁷ is an apocalyptic number.

409867 is a deficient number, since it is larger than the sum of its proper divisors (1).

409867 is an equidigital number, since it uses as much as digits as its factorization.

409867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 409867 is about 640.2085597678. The cubic root of 409867 is about 74.2815546065.

The spelling of 409867 in words is "four hundred nine thousand, eight hundred sixty-seven".