8800721 has 2 divisors, whose sum is σ = 8800722. Its totient is φ = 8800720.

The previous prime is 8800657. The next prime is 8800777. The reversal of 8800721 is 1270088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 180625 = 2936^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 8800721 - 2⁶ = 8800657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8800921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4400360 + 4400361.

It is an arithmetic number, because the mean of its divisors is an integer number (4400361).

Almost surely, 2^8800721 is an apocalyptic number.

It is an amenable number.

8800721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8800721 is an equidigital number, since it uses as much as digits as its factorization.

8800721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 8800721 is about 2966.6009168744. The cubic root of 8800721 is about 206.4616613764.

The spelling of 8800721 in words is "eight million, eight hundred thousand, seven hundred twenty-one".