164439 has 18 divisors (see below), whose sum is σ = 262808. Its totient is φ = 99000.

The previous prime is 164431. The next prime is 164443. The reversal of 164439 is 934461.

It is not a de Polignac number, because 164439 - 2³ = 164431 is a prime.

It is a super-3 number, since 3×164439³ = 13339382806009557, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1014 + ... + 1164.

2¹⁶⁴⁴³⁹ is an apocalyptic number.

164439 is a deficient number, since it is larger than the sum of its proper divisors (98369).

164439 is a wasteful number, since it uses less digits than its factorization.

164439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 164439 is about 405.5107890057. The cubic root of 164439 is about 54.7858338007.

The spelling of 164439 in words is "one hundred sixty-four thousand, four hundred thirty-nine".