409189 has 4 divisors (see below), whose sum is σ = 446400. Its totient is φ = 371980.

The previous prime is 409187. The next prime is 409217. The reversal of 409189 is 981904.

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 409189 - 2¹ = 409187 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18589 + ... + 18610.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2⁴⁰⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

409189 is a deficient number, since it is larger than the sum of its proper divisors (37211).

409189 is a wasteful number, since it uses less digits than its factorization.

409189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37210.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 409189 is about 639.6788256618. The cubic root of 409189 is about 74.2405732722.

It can be divided in two parts, 40 and 9189, that added together give a palindrome (9229).

The spelling of 409189 in words is "four hundred nine thousand, one hundred eighty-nine".