287951 has 4 divisors (see below), whose sum is σ = 290904. Its totient is φ = 285000.

The previous prime is 287939. The next prime is 287977. The reversal of 287951 is 159782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 287951 - 2⁶ = 287887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287921) 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, 1325 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (72726).

2²⁸⁷⁹⁵¹ is an apocalyptic number.

287951 is a deficient number, since it is larger than the sum of its proper divisors (2953).

287951 is a wasteful number, since it uses less digits than its factorization.

287951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952.

The product of its digits is 5040, while the sum is 32.

The square root of 287951 is about 536.6106596034. The cubic root of 287951 is about 66.0347995239.

The spelling of 287951 in words is "two hundred eighty-seven thousand, nine hundred fifty-one".