287387 has 2 divisors, whose sum is σ = 287388. Its totient is φ = 287386.

The previous prime is 287383. The next prime is 287393. The reversal of 287387 is 783782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287387 - 2² = 287383 is a prime.

It is a Chen prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287387.

It is not a weakly prime, because it can be changed into another prime (287383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143693 + 143694.

It is an arithmetic number, because the mean of its divisors is an integer number (143694).

2²⁸⁷³⁸⁷ is an apocalyptic number.

287387 is a deficient number, since it is larger than the sum of its proper divisors (1).

287387 is an equidigital number, since it uses as much as digits as its factorization.

287387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 287387 is about 536.0848813388. The cubic root of 287387 is about 65.9916579600.

The spelling of 287387 in words is "two hundred eighty-seven thousand, three hundred eighty-seven".