8752220921 has 4 divisors (see below), whose sum is σ = 8882851152. Its totient is φ = 8621590692.

The previous prime is 8752220881. The next prime is 8752220951. The reversal of 8752220921 is 1290222578.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1290222578 = 2 ⋅645111289.

It is a cyclic number.

It is not a de Polignac number, because 8752220921 - 2¹⁰ = 8752219897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8752220951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65315015 + ... + 65315148.

It is an arithmetic number, because the mean of its divisors is an integer number (2220712788).

Almost surely, 2^8752220921 is an apocalyptic number.

It is an amenable number.

8752220921 is a deficient number, since it is larger than the sum of its proper divisors (130630231).

8752220921 is a wasteful number, since it uses less digits than its factorization.

8752220921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130630230.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 8752220921 is about 93553.3052382437. The cubic root of 8752220921 is about 2060.8169789475.

The spelling of 8752220921 in words is "eight billion, seven hundred fifty-two million, two hundred twenty thousand, nine hundred twenty-one".