239550534721 has 3 divisors (see below), whose sum is σ = 239551024161. Its totient is φ = 239550045282.

The previous prime is 239550534719. The next prime is 239550534731. The reversal of 239550534721 is 127435055932.

The square root of 239550534721 is 489439.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 239550534721 - 2¹ = 239550534719 is a prime.

It is a super-4 number, since 4×239550534721⁴ (a number of 47 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239550534731) by changing a digit.

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 in 2 ways as a sum of consecutive naturals, for example, 244720 + ... + 734158.

It is an arithmetic number, because the mean of its divisors is an integer number (79850341387).

Almost surely, 2^239550534721 is an apocalyptic number.

239550534721 is the 489439-th square number.

239550534721 is the 244720-th centered octagonal number.

It is an amenable number.

239550534721 is a deficient number, since it is larger than the sum of its proper divisors (489440).

239550534721 is an frugal number, since it uses more digits than its factorization.

239550534721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978878 (or 489439 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 239550534721 in words is "two hundred thirty-nine billion, five hundred fifty million, five hundred thirty-four thousand, seven hundred twenty-one".