243487 has 2 divisors, whose sum is σ = 243488. Its totient is φ = 243486.

The previous prime is 243479. The next prime is 243517. The reversal of 243487 is 784342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243487 - 2³ = 243479 is a prime.

It is a Chen prime.

243487 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121743 + 121744.

It is an arithmetic number, because the mean of its divisors is an integer number (121744).

2²⁴³⁴⁸⁷ is an apocalyptic number.

243487 is a deficient number, since it is larger than the sum of its proper divisors (1).

243487 is an equidigital number, since it uses as much as digits as its factorization.

243487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 243487 is about 493.4440191146. Note that the first 3 decimals coincide. The cubic root of 243487 is about 62.4441741504. Note that the first 3 decimals are identical.

It can be divided in two parts, 243 and 487, that multiplied together give a triangular number (118341 = T₄₈₆).

The spelling of 243487 in words is "two hundred forty-three thousand, four hundred eighty-seven".