243587 has 2 divisors, whose sum is σ = 243588. Its totient is φ = 243586.

The previous prime is 243583. The next prime is 243589. The reversal of 243587 is 785342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243587 - 2² = 243583 is a prime.

Together with 243589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121793 + 121794.

It is an arithmetic number, because the mean of its divisors is an integer number (121794).

2²⁴³⁵⁸⁷ is an apocalyptic number.

243587 is a deficient number, since it is larger than the sum of its proper divisors (1).

243587 is an equidigital number, since it uses as much as digits as its factorization.

243587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 29.

The square root of 243587 is about 493.5453373298. The cubic root of 243587 is about 62.4527215784.

The spelling of 243587 in words is "two hundred forty-three thousand, five hundred eighty-seven".