281973 has 8 divisors (see below), whose sum is σ = 378688. Its totient is φ = 186624.

The previous prime is 281971. The next prime is 281989. The reversal of 281973 is 379182.

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 281973 - 2¹ = 281971 is a prime.

It is a Duffinian number.

It is a Curzon number.

281973 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 281973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281971) 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, 336 + ... + 822.

It is an arithmetic number, because the mean of its divisors is an integer number (47336).

2²⁸¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

281973 is a deficient number, since it is larger than the sum of its proper divisors (96715).

281973 is a wasteful number, since it uses less digits than its factorization.

281973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683.

The product of its digits is 3024, while the sum is 30.

The square root of 281973 is about 531.0112993148. The cubic root of 281973 is about 65.5746289208.

The spelling of 281973 in words is "two hundred eighty-one thousand, nine hundred seventy-three".