287233 has 2 divisors, whose sum is σ = 287234. Its totient is φ = 287232.

The previous prime is 287219. The next prime is 287237. The reversal of 287233 is 332782.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223729 + 63504 = 473^2 + 252^2 .

It is a cyclic number.

It is not a de Polignac number, because 287233 - 2⁹ = 286721 is a prime.

It is a d-powerful number, because it can be written as 2¹² + 8⁴ + 2¹⁸ + 7⁵ + 3² + 3⁴ .

287233 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 287198 and 287207.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287233.

It is not a weakly prime, because it can be changed into another prime (287237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143616 + 143617.

It is an arithmetic number, because the mean of its divisors is an integer number (143617).

2²⁸⁷²³³ is an apocalyptic number.

It is an amenable number.

287233 is a deficient number, since it is larger than the sum of its proper divisors (1).

287233 is an equidigital number, since it uses as much as digits as its factorization.

287233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 287233 is about 535.9412281211. The cubic root of 287233 is about 65.9798683626.

The spelling of 287233 in words is "two hundred eighty-seven thousand, two hundred thirty-three".