287057 has 2 divisors, whose sum is σ = 287058. Its totient is φ = 287056.

The previous prime is 287047. The next prime is 287059. The reversal of 287057 is 750782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 55696 = 481^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 287057 - 2⁸ = 286801 is a prime.

Together with 287059, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287057.

It is not a weakly prime, because it can be changed into another prime (287059) 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, 143528 + 143529.

It is an arithmetic number, because the mean of its divisors is an integer number (143529).

2²⁸⁷⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

287057 is a deficient number, since it is larger than the sum of its proper divisors (1).

287057 is an equidigital number, since it uses as much as digits as its factorization.

287057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 287057 is about 535.7770058522. Note that the first 3 decimals coincide. The cubic root of 287057 is about 65.9663893758.

The spelling of 287057 in words is "two hundred eighty-seven thousand, fifty-seven".