243569394 has 12 divisors (see below), whose sum is σ = 527733726. Its totient is φ = 81189792.

The previous prime is 243569351. The next prime is 243569429. The reversal of 243569394 is 493965342.

It can be written as a sum of positive squares in only one way, i.e., 152843769 + 90725625 = 12363^2 + 9525^2 .

It is a Curzon number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 6765799 + ... + 6765834.

Almost surely, 2^243569394 is an apocalyptic number.

243569394 is an abundant number, since it is smaller than the sum of its proper divisors (284164332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243569394 is a wasteful number, since it uses less digits than its factorization.

243569394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531641 (or 13531638 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 243569394 is about 15606.7099031154. The cubic root of 243569394 is about 624.5121688790.

The spelling of 243569394 in words is "two hundred forty-three million, five hundred sixty-nine thousand, three hundred ninety-four".