8613603521 has 4 divisors (see below), whose sum is σ = 8626917312. Its totient is φ = 8600289732.

The previous prime is 8613603517. The next prime is 8613603533. The reversal of 8613603521 is 1253063168.

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 not a de Polignac number, because 8613603521 - 2² = 8613603517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8613603721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6655925 + ... + 6657218.

It is an arithmetic number, because the mean of its divisors is an integer number (2156729328).

Almost surely, 2^8613603521 is an apocalyptic number.

It is an amenable number.

8613603521 is a deficient number, since it is larger than the sum of its proper divisors (13313791).

8613603521 is a wasteful number, since it uses less digits than its factorization.

8613603521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13313790.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 8613603521 is about 92809.5012431378. The cubic root of 8613603521 is about 2049.8793124270.

Adding to 8613603521 its reverse (1253063168), we get a palindrome (9866666689).

The spelling of 8613603521 in words is "eight billion, six hundred thirteen million, six hundred three thousand, five hundred twenty-one".