287197 has 4 divisors (see below), whose sum is σ = 293920. Its totient is φ = 280476.

The previous prime is 287191. The next prime is 287219. The reversal of 287197 is 791782.

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, and also an emirpimes, since its reverse is a distinct semiprime: 791782 = 2 ⋅395891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287197 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 (287191) 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, 3297 + ... + 3382.

It is an arithmetic number, because the mean of its divisors is an integer number (73480).

2²⁸⁷¹⁹⁷ is an apocalyptic number.

It is an amenable number.

287197 is a deficient number, since it is larger than the sum of its proper divisors (6723).

287197 is an equidigital number, since it uses as much as digits as its factorization.

287197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722.

The product of its digits is 7056, while the sum is 34.

The square root of 287197 is about 535.9076412965. The cubic root of 287197 is about 65.9771117451.

It can be divided in two parts, 287 and 197, that added together give a palindrome (484).

The spelling of 287197 in words is "two hundred eighty-seven thousand, one hundred ninety-seven".