189409 has 8 divisors (see below), whose sum is σ = 210528. Its totient is φ = 168960.

The previous prime is 189407. The next prime is 189421. The reversal of 189409 is 904981.

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

It is not a de Polignac number, because 189409 - 2¹ = 189407 is a prime.

It is a Duffinian number.

189409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (189401) 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, 609 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (26316).

2¹⁸⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

189409 is a deficient number, since it is larger than the sum of its proper divisors (21119).

189409 is a wasteful number, since it uses less digits than its factorization.

189409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

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

The square root of 189409 is about 435.2114428643. The cubic root of 189409 is about 57.4293018939.

The spelling of 189409 in words is "one hundred eighty-nine thousand, four hundred nine".