243389443 has 6 divisors (see below), whose sum is σ = 267527372. Its totient is φ = 221263020.

The previous prime is 243389413. The next prime is 243389467. The reversal of 243389443 is 344983342.

It is not a de Polignac number, because 243389443 - 2²¹ = 241292291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243389396 and 243389405.

It is not an unprimeable number, because it can be changed into a prime (243389413) 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 in 5 ways as a sum of consecutive naturals, for example, 1005621 + ... + 1005862.

Almost surely, 2^243389443 is an apocalyptic number.

243389443 is a deficient number, since it is larger than the sum of its proper divisors (24137929).

243389443 is a wasteful number, since it uses less digits than its factorization.

243389443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011505 (or 2011494 counting only the distinct ones).

The product of its digits is 248832, while the sum is 40.

The square root of 243389443 is about 15600.9436573561. The cubic root of 243389443 is about 624.3583328066.

The spelling of 243389443 in words is "two hundred forty-three million, three hundred eighty-nine thousand, four hundred forty-three".