243371289 has 12 divisors (see below), whose sum is σ = 377474064. Its totient is φ = 139069224.

The previous prime is 243371281. The next prime is 243371291. The reversal of 243371289 is 982173342.

It is not a de Polignac number, because 243371289 - 2³ = 243371281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243371281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827647 + ... + 827940.

It is an arithmetic number, because the mean of its divisors is an integer number (31456172).

Almost surely, 2^243371289 is an apocalyptic number.

It is an amenable number.

243371289 is a deficient number, since it is larger than the sum of its proper divisors (134102775).

243371289 is a wasteful number, since it uses less digits than its factorization.

243371289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655604 (or 1655597 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 243371289 is about 15600.3618227271. The cubic root of 243371289 is about 624.3428091492.

The spelling of 243371289 in words is "two hundred forty-three million, three hundred seventy-one thousand, two hundred eighty-nine".