287393 has 2 divisors, whose sum is σ = 287394. Its totient is φ = 287392.

The previous prime is 287387. The next prime is 287437. The reversal of 287393 is 393782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169744 + 117649 = 412^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 287393 - 2⁸ = 287137 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287393.

It is not a weakly prime, because it can be changed into another prime (287333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143696 + 143697.

It is an arithmetic number, because the mean of its divisors is an integer number (143697).

2²⁸⁷³⁹³ is an apocalyptic number.

It is an amenable number.

287393 is a deficient number, since it is larger than the sum of its proper divisors (1).

287393 is an equidigital number, since it uses as much as digits as its factorization.

287393 is an odious number, because the sum of its binary digits is odd.

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

The square root of 287393 is about 536.0904774383. The cubic root of 287393 is about 65.9921172098.

The spelling of 287393 in words is "two hundred eighty-seven thousand, three hundred ninety-three".