239984565 has 16 divisors (see below), whose sum is σ = 390484800. Its totient is φ = 125821952.

The previous prime is 239984561. The next prime is 239984581. The reversal of 239984565 is 565489932.

It is a cyclic number.

It is not a de Polignac number, because 239984565 - 2² = 239984561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239984561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134700 + ... + 136469.

It is an arithmetic number, because the mean of its divisors is an integer number (24405300).

Almost surely, 2^239984565 is an apocalyptic number.

It is an amenable number.

239984565 is a deficient number, since it is larger than the sum of its proper divisors (150500235).

239984565 is a wasteful number, since it uses less digits than its factorization.

239984565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271236.

The product of its digits is 2332800, while the sum is 51.

The square root of 239984565 is about 15491.4352143370. The cubic root of 239984565 is about 621.4331786458.

The spelling of 239984565 in words is "two hundred thirty-nine million, nine hundred eighty-four thousand, five hundred sixty-five".