81073 has 8 divisors (see below), whose sum is σ = 90720. Its totient is φ = 72000.

The previous prime is 81071. The next prime is 81077. The reversal of 81073 is 37018.

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

It is a cyclic number.

It is not a de Polignac number, because 81073 - 2¹ = 81071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81073.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198 + ... + 448.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2⁸¹⁰⁷³ is an apocalyptic number.

It is an amenable number.

81073 is a deficient number, since it is larger than the sum of its proper divisors (9647).

81073 is a wasteful number, since it uses less digits than its factorization.

81073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 81073 is about 284.7332084601. The cubic root of 81073 is about 43.2804812581.

It can be divided in two parts, 8 and 1073, that added together give a triangular number (1081 = T₄₆).

The spelling of 81073 in words is "eighty-one thousand, seventy-three".