243416645 has 8 divisors (see below), whose sum is σ = 292379640. Its totient is φ = 194546880.

The previous prime is 243416639. The next prime is 243416647. The reversal of 243416645 is 546614342.

It can be written as a sum of positive squares in 4 ways, for example, as 586756 + 242829889 = 766^2 + 15583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243416645 - 2⁴ = 243416629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243416647) 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 7 ways as a sum of consecutive naturals, for example, 17426 + ... + 28115.

It is an arithmetic number, because the mean of its divisors is an integer number (36547455).

Almost surely, 2^243416645 is an apocalyptic number.

It is an amenable number.

243416645 is a deficient number, since it is larger than the sum of its proper divisors (48962995).

243416645 is a wasteful number, since it uses less digits than its factorization.

243416645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46615.

The product of its digits is 69120, while the sum is 35.

The square root of 243416645 is about 15601.8154392366. The cubic root of 243416645 is about 624.3815920497.

The spelling of 243416645 in words is "two hundred forty-three million, four hundred sixteen thousand, six hundred forty-five".