243698065 has 16 divisors (see below), whose sum is σ = 315318528. Its totient is φ = 179741376.

The previous prime is 243698051. The next prime is 243698089. The reversal of 243698065 is 560896342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243698065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67332 + ... + 70858.

It is an arithmetic number, because the mean of its divisors is an integer number (19707408).

Almost surely, 2^243698065 is an apocalyptic number.

It is an amenable number.

243698065 is a deficient number, since it is larger than the sum of its proper divisors (71620463).

243698065 is a wasteful number, since it uses less digits than its factorization.

243698065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 243698065 is about 15610.8316562571. The cubic root of 243698065 is about 624.6221203772.

The spelling of 243698065 in words is "two hundred forty-three million, six hundred ninety-eight thousand, sixty-five".