9936240521 has 4 divisors (see below), whose sum is σ = 9936796032. Its totient is φ = 9935685012.

The previous prime is 9936240481. The next prime is 9936240533. The reversal of 9936240521 is 1250426399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9936240521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9936240581) 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 3 ways as a sum of consecutive naturals, for example, 250001 + ... + 287006.

It is an arithmetic number, because the mean of its divisors is an integer number (2484199008).

Almost surely, 2^9936240521 is an apocalyptic number.

It is an amenable number.

9936240521 is a deficient number, since it is larger than the sum of its proper divisors (555511).

9936240521 is a wasteful number, since it uses less digits than its factorization.

9936240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555510.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 9936240521 is about 99680.6928196228. The cubic root of 9936240521 is about 2149.8460694554.

The spelling of 9936240521 in words is "nine billion, nine hundred thirty-six million, two hundred forty thousand, five hundred twenty-one".