162309 has 16 divisors (see below), whose sum is σ = 253440. Its totient is φ = 90480.

The previous prime is 162293. The next prime is 162343. The reversal of 162309 is 903261.

It is not a de Polignac number, because 162309 - 2⁴ = 162293 is a prime.

It is a super-2 number, since 2×162309² = 52688422962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2¹⁶²³⁰⁹ is an apocalyptic number.

It is an amenable number.

162309 is a deficient number, since it is larger than the sum of its proper divisors (91131).

162309 is a wasteful number, since it uses less digits than its factorization.

162309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 162309 is about 402.8759114169. The cubic root of 162309 is about 54.5482556642.

It can be divided in two parts, 16230 and 9, that multiplied together give a triangular number (146070 = T₅₄₀).

The spelling of 162309 in words is "one hundred sixty-two thousand, three hundred nine".