243648489 has 16 divisors (see below), whose sum is σ = 371555712. Its totient is φ = 139122048.

The previous prime is 243648487. The next prime is 243648511. The reversal of 243648489 is 984846342.

It is not a de Polignac number, because 243648489 - 2¹ = 243648487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243648481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30277 + ... + 37469.

It is an arithmetic number, because the mean of its divisors is an integer number (23222232).

Almost surely, 2^243648489 is an apocalyptic number.

It is an amenable number.

243648489 is a deficient number, since it is larger than the sum of its proper divisors (127907223).

243648489 is a wasteful number, since it uses less digits than its factorization.

243648489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8816.

The product of its digits is 1327104, while the sum is 48.

The square root of 243648489 is about 15609.2437036520. The cubic root of 243648489 is about 624.5797614493.

The spelling of 243648489 in words is "two hundred forty-three million, six hundred forty-eight thousand, four hundred eighty-nine".