287983 has 8 divisors (see below), whose sum is σ = 316800. Its totient is φ = 260568.

The previous prime is 287977. The next prime is 288007. The reversal of 287983 is 389782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287983 is a prime.

It is a Duffinian number.

287983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (39600).

2²⁸⁷⁹⁸³ is an apocalyptic number.

287983 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

287983 is a deficient number, since it is larger than the sum of its proper divisors (28817).

287983 is a wasteful number, since it uses less digits than its factorization.

287983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its digits is 24192, while the sum is 37.

The square root of 287983 is about 536.6404755514. The cubic root of 287983 is about 66.0372455828.

The spelling of 287983 in words is "two hundred eighty-seven thousand, nine hundred eighty-three".