169879 has 4 divisors (see below), whose sum is σ = 178840. Its totient is φ = 160920.

The previous prime is 169859. The next prime is 169889. The reversal of 169879 is 978961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978961 = 613 ⋅1597.

It is a cyclic number.

It is not a de Polignac number, because 169879 - 2⁷ = 169751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4452 + ... + 4489.

It is an arithmetic number, because the mean of its divisors is an integer number (44710).

2¹⁶⁹⁸⁷⁹ is an apocalyptic number.

169879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

169879 is a deficient number, since it is larger than the sum of its proper divisors (8961).

169879 is an equidigital number, since it uses as much as digits as its factorization.

169879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8960.

The product of its digits is 27216, while the sum is 40.

The square root of 169879 is about 412.1638023893. The cubic root of 169879 is about 55.3834363373.

The spelling of 169879 in words is "one hundred sixty-nine thousand, eight hundred seventy-nine".