409879 has 2 divisors, whose sum is σ = 409880. Its totient is φ = 409878.

The previous prime is 409867. The next prime is 409889. The reversal of 409879 is 978904.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409879 - 2¹⁷ = 278807 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204939 + 204940.

It is an arithmetic number, because the mean of its divisors is an integer number (204940).

2⁴⁰⁹⁸⁷⁹ is an apocalyptic number.

409879 is a deficient number, since it is larger than the sum of its proper divisors (1).

409879 is an equidigital number, since it uses as much as digits as its factorization.

409879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 409879 is about 640.2179316452. The cubic root of 409879 is about 74.2822795327.

The spelling of 409879 in words is "four hundred nine thousand, eight hundred seventy-nine".