406109 has 4 divisors (see below), whose sum is σ = 443040. Its totient is φ = 369180.

The previous prime is 406093. The next prime is 406117. The reversal of 406109 is 901604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 406109 - 2⁴ = 406093 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 (406169) 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, 18449 + ... + 18470.

It is an arithmetic number, because the mean of its divisors is an integer number (110760).

2⁴⁰⁶¹⁰⁹ is an apocalyptic number.

It is an amenable number.

406109 is a deficient number, since it is larger than the sum of its proper divisors (36931).

406109 is a wasteful number, since it uses less digits than its factorization.

406109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36930.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 406109 is about 637.2668200997. The cubic root of 406109 is about 74.0538322685.

It can be divided in two parts, 406 and 109, that added together give a palindrome (515).

The spelling of 406109 in words is "four hundred six thousand, one hundred nine".