243935697 has 16 divisors (see below), whose sum is σ = 329380352. Its totient is φ = 160565760.

The previous prime is 243935693. The next prime is 243935729. The reversal of 243935697 is 796539342.

It is a happy number.

It is not a de Polignac number, because 243935697 - 2² = 243935693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243935693) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 175947 + ... + 177327.

It is an arithmetic number, because the mean of its divisors is an integer number (20586272).

Almost surely, 2^243935697 is an apocalyptic number.

It is an amenable number.

243935697 is a deficient number, since it is larger than the sum of its proper divisors (85444655).

243935697 is a wasteful number, since it uses less digits than its factorization.

243935697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its digits is 1224720, while the sum is 48.

The square root of 243935697 is about 15618.4409273141. The cubic root of 243935697 is about 624.8250791556.

The spelling of 243935697 in words is "two hundred forty-three million, nine hundred thirty-five thousand, six hundred ninety-seven".