409039 has 4 divisors (see below), whose sum is σ = 410400. Its totient is φ = 407680.

The previous prime is 409033. The next prime is 409043. The reversal of 409039 is 930904.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 409039 - 2⁵ = 409007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 904.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2⁴⁰⁹⁰³⁹ is an apocalyptic number.

409039 is a deficient number, since it is larger than the sum of its proper divisors (1361).

409039 is an equidigital number, since it uses as much as digits as its factorization.

409039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 409039 is about 639.5615685765. The cubic root of 409039 is about 74.2315004908.

The spelling of 409039 in words is "four hundred nine thousand, thirty-nine".