243887 has 4 divisors (see below), whose sum is σ = 278736. Its totient is φ = 209040.

The previous prime is 243871. The next prime is 243889. The reversal of 243887 is 788342.

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 243887 - 2⁴ = 243871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243887.

It is not an unprimeable number, because it can be changed into a prime (243889) 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, 17414 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (69684).

2²⁴³⁸⁸⁷ is an apocalyptic number.

243887 is a deficient number, since it is larger than the sum of its proper divisors (34849).

243887 is an equidigital number, since it uses as much as digits as its factorization.

243887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34848.

The product of its digits is 10752, while the sum is 32.

The square root of 243887 is about 493.8491672566. The cubic root of 243887 is about 62.4783498345.

The spelling of 243887 in words is "two hundred forty-three thousand, eight hundred eighty-seven".