169139 has 4 divisors (see below), whose sum is σ = 171360. Its totient is φ = 166920.

The previous prime is 169129. The next prime is 169151. The reversal of 169139 is 931961.

169139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931961 = 379 ⋅2459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169139 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2¹⁶⁹¹³⁹ is an apocalyptic number.

169139 is a deficient number, since it is larger than the sum of its proper divisors (2221).

169139 is an equidigital number, since it uses as much as digits as its factorization.

169139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its digits is 1458, while the sum is 29.

The square root of 169139 is about 411.2651213025. The cubic root of 169139 is about 55.3029017680.

The spelling of 169139 in words is "one hundred sixty-nine thousand, one hundred thirty-nine".