243989692 has 12 divisors (see below), whose sum is σ = 438522280. Its totient is φ = 118697616.

The previous prime is 243989689. The next prime is 243989693. The reversal of 243989692 is 296989342.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243989693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824142 + ... + 824437.

Almost surely, 2^243989692 is an apocalyptic number.

It is an amenable number.

243989692 is a deficient number, since it is larger than the sum of its proper divisors (194532588).

243989692 is a wasteful number, since it uses less digits than its factorization.

243989692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648620 (or 1648618 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 243989692 is about 15620.1693972889. The cubic root of 243989692 is about 624.8711772894.

The spelling of 243989692 in words is "two hundred forty-three million, nine hundred eighty-nine thousand, six hundred ninety-two".