309169 has 8 divisors (see below), whose sum is σ = 365760. Its totient is φ = 255696.

The previous prime is 309167. The next prime is 309173. The reversal of 309169 is 961903.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 309169 - 2¹ = 309167 is a prime.

It is a super-2 number, since 2×309169² = 191170941122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (309167) 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 7 ways as a sum of consecutive naturals, for example, 559 + ... + 964.

It is an arithmetic number, because the mean of its divisors is an integer number (45720).

2³⁰⁹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

309169 is a deficient number, since it is larger than the sum of its proper divisors (56591).

309169 is a wasteful number, since it uses less digits than its factorization.

309169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

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

The square root of 309169 is about 556.0296754671. The cubic root of 309169 is about 67.6184659472.

It can be divided in two parts, 3091 and 69, that added together give a triangular number (3160 = T₇₉).

The spelling of 309169 in words is "three hundred nine thousand, one hundred sixty-nine".