164239 has 2 divisors, whose sum is σ = 164240. Its totient is φ = 164238.

The previous prime is 164233. The next prime is 164249. The reversal of 164239 is 932461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164239 - 2³ = 164231 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82119 + 82120.

It is an arithmetic number, because the mean of its divisors is an integer number (82120).

2¹⁶⁴²³⁹ is an apocalyptic number.

164239 is a deficient number, since it is larger than the sum of its proper divisors (1).

164239 is an equidigital number, since it uses as much as digits as its factorization.

164239 is an evil number, because the sum of its binary digits is even.

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

The square root of 164239 is about 405.2641114138. The cubic root of 164239 is about 54.7636135813.

It can be divided in two parts, 1642 and 39, that added together give a square (1681 = 41²).

The spelling of 164239 in words is "one hundred sixty-four thousand, two hundred thirty-nine".