228973 has 4 divisors (see below), whose sum is σ = 242460. Its totient is φ = 215488.

The previous prime is 228961. The next prime is 228983. The reversal of 228973 is 379822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162409 + 66564 = 403^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 228973 - 2⁹ = 228461 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228913) 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, 6718 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (60615).

2²²⁸⁹⁷³ is an apocalyptic number.

It is an amenable number.

228973 is a deficient number, since it is larger than the sum of its proper divisors (13487).

228973 is a wasteful number, since it uses less digits than its factorization.

228973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13486.

The product of its digits is 6048, while the sum is 31.

The square root of 228973 is about 478.5112328880. The cubic root of 228973 is about 61.1779271647.

The spelling of 228973 in words is "two hundred twenty-eight thousand, nine hundred seventy-three".