163439 has 4 divisors (see below), whose sum is σ = 164256. Its totient is φ = 162624.

The previous prime is 163433. The next prime is 163469. The reversal of 163439 is 934361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 934361 = 37 ⋅25253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163439 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 (163433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122 + ... + 584.

It is an arithmetic number, because the mean of its divisors is an integer number (41064).

2¹⁶³⁴³⁹ is an apocalyptic number.

163439 is a deficient number, since it is larger than the sum of its proper divisors (817).

163439 is an equidigital number, since it uses as much as digits as its factorization.

163439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 1944, while the sum is 26.

The square root of 163439 is about 404.2758958929. The cubic root of 163439 is about 54.6745518733.

The spelling of 163439 in words is "one hundred sixty-three thousand, four hundred thirty-nine".