243000664 has 8 divisors (see below), whose sum is σ = 455626260. Its totient is φ = 121500328.

The previous prime is 243000649. The next prime is 243000679. The reversal of 243000664 is 466000342.

It is an interprime number because it is at equal distance from previous prime (243000649) and next prime (243000679).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15187534 + ... + 15187549.

Almost surely, 2^243000664 is an apocalyptic number.

It is an amenable number.

243000664 is a deficient number, since it is larger than the sum of its proper divisors (212625596).

243000664 is a wasteful number, since it uses less digits than its factorization.

243000664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30375089 (or 30375085 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 243000664 is about 15588.4785659153. The cubic root of 243000664 is about 624.0257153001.

The spelling of 243000664 in words is "two hundred forty-three million, six hundred sixty-four", and thus it is an aban number.