8223720961 has 8 divisors (see below), whose sum is σ = 8677216800. Its totient is φ = 7772292000.

The previous prime is 8223720937. The next prime is 8223720971. The reversal of 8223720961 is 1690273228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8223720961 - 2⁷ = 8223720833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8223720971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508540 + ... + 524461.

It is an arithmetic number, because the mean of its divisors is an integer number (1084652100).

Almost surely, 2^8223720961 is an apocalyptic number.

It is an amenable number.

8223720961 is a deficient number, since it is larger than the sum of its proper divisors (453495839).

8223720961 is a wasteful number, since it uses less digits than its factorization.

8223720961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033439.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 8223720961 is about 90684.7338916535. The cubic root of 8223720961 is about 2018.4722756657.

The spelling of 8223720961 in words is "eight billion, two hundred twenty-three million, seven hundred twenty thousand, nine hundred sixty-one".