169131 has 4 divisors (see below), whose sum is σ = 225512. Its totient is φ = 112752.

The previous prime is 169129. The next prime is 169151. The reversal of 169131 is 131961.

It is a happy number.

169131 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: 131961 = 3 ⋅43987.

It is not a de Polignac number, because 169131 - 2¹ = 169129 is a prime.

It is a super-2 number, since 2×169131² = 57210590322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169098 and 169107.

It is not an unprimeable number, because it can be changed into a prime (169111) 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, 28186 + ... + 28191.

It is an arithmetic number, because the mean of its divisors is an integer number (56378).

2¹⁶⁹¹³¹ is an apocalyptic number.

169131 is a deficient number, since it is larger than the sum of its proper divisors (56381).

169131 is an equidigital number, since it uses as much as digits as its factorization.

169131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56380.

The product of its digits is 162, while the sum is 21.

The square root of 169131 is about 411.2553951014. The cubic root of 169131 is about 55.3020298418.

It can be divided in two parts, 169 and 131, that added together give a triangular number (300 = T₂₄).

The spelling of 169131 in words is "one hundred sixty-nine thousand, one hundred thirty-one".