581880721 has 2 divisors, whose sum is σ = 581880722. Its totient is φ = 581880720.

The previous prime is 581880701. The next prime is 581880781. The reversal of 581880721 is 127088185.

581880721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300849025 + 281031696 = 17345^2 + 16764^2 .

It is a cyclic number.

It is not a de Polignac number, because 581880721 - 2¹¹ = 581878673 is a prime.

It is not a weakly prime, because it can be changed into another prime (581880701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290940360 + 290940361.

It is an arithmetic number, because the mean of its divisors is an integer number (290940361).

Almost surely, 2^581880721 is an apocalyptic number.

It is an amenable number.

581880721 is a deficient number, since it is larger than the sum of its proper divisors (1).

581880721 is an equidigital number, since it uses as much as digits as its factorization.

581880721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 581880721 is about 24122.2039001415. The cubic root of 581880721 is about 834.8555194818.

The spelling of 581880721 in words is "five hundred eighty-one million, eight hundred eighty thousand, seven hundred twenty-one".