164139 has 4 divisors (see below), whose sum is σ = 218856. Its totient is φ = 109424.

The previous prime is 164117. The next prime is 164147. The reversal of 164139 is 931461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164139 - 2⁷ = 164011 is a prime.

It is a super-2 number, since 2×164139² = 53883222642, which contains 22 as substring.

It is a D-number.

164139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (164149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27354 + ... + 27359.

It is an arithmetic number, because the mean of its divisors is an integer number (54714).

2¹⁶⁴¹³⁹ is an apocalyptic number.

164139 is a deficient number, since it is larger than the sum of its proper divisors (54717).

164139 is an equidigital number, since it uses as much as digits as its factorization.

164139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54716.

The product of its digits is 648, while the sum is 24.

The square root of 164139 is about 405.1407162950. The cubic root of 164139 is about 54.7524967065.

It can be divided in two parts, 164 and 139, that added together give a palindrome (303).

The spelling of 164139 in words is "one hundred sixty-four thousand, one hundred thirty-nine".