406609 has 8 divisors (see below), whose sum is σ = 480960. Its totient is φ = 336336.

The previous prime is 406591. The next prime is 406631. The reversal of 406609 is 906604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406609 - 2⁵ = 406577 is a prime.

It is a Duffinian number.

406609 is a modest number, since divided by 609 gives 406 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (60120).

2⁴⁰⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

406609 is a deficient number, since it is larger than the sum of its proper divisors (74351).

406609 is a wasteful number, since it uses less digits than its factorization.

406609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 406609 is about 637.6589997797. The cubic root of 406609 is about 74.0842114120.

It can be divided in two parts, 40660 and 9, that multiplied together give a triangular number (365940 = T₈₅₅).

The spelling of 406609 in words is "four hundred six thousand, six hundred nine".