169149 has 4 divisors (see below), whose sum is σ = 225536. Its totient is φ = 112764.

The previous prime is 169129. The next prime is 169151. The reversal of 169149 is 941961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941961 = 3 ⋅313987.

It is not a de Polignac number, because 169149 - 2⁸ = 168893 is a prime.

It is a super-2 number, since 2×169149² = 57222768402, which contains 22 as substring.

It is a D-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 an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28189 + ... + 28194.

It is an arithmetic number, because the mean of its divisors is an integer number (56384).

2¹⁶⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

169149 is a deficient number, since it is larger than the sum of its proper divisors (56387).

169149 is an equidigital number, since it uses as much as digits as its factorization.

169149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56386.

The product of its digits is 1944, while the sum is 30.

The square root of 169149 is about 411.2772787305. The cubic root of 169149 is about 55.3039916371.

The spelling of 169149 in words is "one hundred sixty-nine thousand, one hundred forty-nine".