287933 has 2 divisors, whose sum is σ = 287934. Its totient is φ = 287932.

The previous prime is 287921. The next prime is 287939. The reversal of 287933 is 339782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284089 + 3844 = 533^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 287933 - 2¹² = 283837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 287933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143966 + 143967.

It is an arithmetic number, because the mean of its divisors is an integer number (143967).

2²⁸⁷⁹³³ is an apocalyptic number.

It is an amenable number.

287933 is a deficient number, since it is larger than the sum of its proper divisors (1).

287933 is an equidigital number, since it uses as much as digits as its factorization.

287933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 287933 is about 536.5938874046. The cubic root of 287933 is about 66.0334235361.

The spelling of 287933 in words is "two hundred eighty-seven thousand, nine hundred thirty-three".