169091 has 4 divisors (see below), whose sum is σ = 182112. Its totient is φ = 156072.

The previous prime is 169079. The next prime is 169093. The reversal of 169091 is 190961.

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 169091 - 2¹⁰ = 168067 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 169091.

It is not an unprimeable number, because it can be changed into a prime (169093) 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, 6491 + ... + 6516.

It is an arithmetic number, because the mean of its divisors is an integer number (45528).

2¹⁶⁹⁰⁹¹ is an apocalyptic number.

169091 is a deficient number, since it is larger than the sum of its proper divisors (13021).

169091 is a wasteful number, since it uses less digits than its factorization.

169091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 169091 is about 411.2067606448. The cubic root of 169091 is about 55.2976697982.

The spelling of 169091 in words is "one hundred sixty-nine thousand, ninety-one".