287089 has 4 divisors (see below), whose sum is σ = 313200. Its totient is φ = 260980.

The previous prime is 287087. The next prime is 287093. The reversal of 287089 is 980782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 287089 - 2¹ = 287087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13039 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (78300).

2²⁸⁷⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

287089 is a deficient number, since it is larger than the sum of its proper divisors (26111).

287089 is a wasteful number, since it uses less digits than its factorization.

287089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26110.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 287089 is about 535.8068681904. The cubic root of 287089 is about 65.9688405104.

It can be divided in two parts, 28 and 7089, that added together give a palindrome (7117).

The spelling of 287089 in words is "two hundred eighty-seven thousand, eighty-nine".