169309 has 12 divisors (see below), whose sum is σ = 207264. Its totient is φ = 135432.

The previous prime is 169307. The next prime is 169313. The reversal of 169309 is 903961.

It is a happy number.

It is not a de Polignac number, because 169309 - 2¹ = 169307 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 (169307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2494 + ... + 2560.

It is an arithmetic number, because the mean of its divisors is an integer number (17272).

2¹⁶⁹³⁰⁹ is an apocalyptic number.

169309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

169309 is a deficient number, since it is larger than the sum of its proper divisors (37955).

169309 is an equidigital number, since it uses as much as digits as its factorization.

169309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 169309 is about 411.4717487264. The cubic root of 169309 is about 55.3214237041.

The spelling of 169309 in words is "one hundred sixty-nine thousand, three hundred nine".