287897 has 8 divisors (see below), whose sum is σ = 306432. Its totient is φ = 270000.

The previous prime is 287887. The next prime is 287921. The reversal of 287897 is 798782.

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

It is a cyclic number.

It is not a de Polignac number, because 287897 - 2¹⁰ = 286873 is a prime.

It is a super-5 number, since 5×287897⁵ (a number of 28 digits) contains 55555 as substring.

It is a d-powerful number, because it can be written as 2¹⁴ + 8² + 8⁶ + 7³ + 9⁴ + 7⁴ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287897.

It is not an unprimeable number, because it can be changed into a prime (287857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022 + ... + 1272.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2²⁸⁷⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

287897 is a deficient number, since it is larger than the sum of its proper divisors (18535).

287897 is a wasteful number, since it uses less digits than its factorization.

287897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319.

The product of its digits is 56448, while the sum is 41.

The square root of 287897 is about 536.5603414342. The cubic root of 287897 is about 66.0306713886.

The spelling of 287897 in words is "two hundred eighty-seven thousand, eight hundred ninety-seven".