243687 has 8 divisors (see below), whose sum is σ = 336240. Its totient is φ = 156800.

The previous prime is 243673. The next prime is 243701. The reversal of 243687 is 786342.

It is an interprime number because it is at equal distance from previous prime (243673) and next prime (243701).

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 243687 - 2⁴ = 243671 is a prime.

243687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243647) 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, 1314 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (42030).

2²⁴³⁶⁸⁷ is an apocalyptic number.

243687 is a deficient number, since it is larger than the sum of its proper divisors (92553).

243687 is a wasteful number, since it uses less digits than its factorization.

243687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833.

The product of its digits is 8064, while the sum is 30.

The square root of 243687 is about 493.6466347500. The cubic root of 243687 is about 62.4612666673.

It can be divided in two parts, 24 and 3687, that multiplied together give a palindrome (88488).

The spelling of 243687 in words is "two hundred forty-three thousand, six hundred eighty-seven".