287977 has 2 divisors, whose sum is σ = 287978. Its totient is φ = 287976.

The previous prime is 287939. The next prime is 288007. The reversal of 287977 is 779782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173056 + 114921 = 416^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 287977 - 2⁷ = 287849 is a prime.

It is not a weakly prime, because it can be changed into another prime (282977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143988 + 143989.

It is an arithmetic number, because the mean of its divisors is an integer number (143989).

2²⁸⁷⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

287977 is a deficient number, since it is larger than the sum of its proper divisors (1).

287977 is an equidigital number, since it uses as much as digits as its factorization.

287977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 40.

The square root of 287977 is about 536.6348851873. The cubic root of 287977 is about 66.0367869606.

The spelling of 287977 in words is "two hundred eighty-seven thousand, nine hundred seventy-seven".