581720089 has 2 divisors, whose sum is σ = 581720090. Its totient is φ = 581720088.

The previous prime is 581720023. The next prime is 581720119. The reversal of 581720089 is 980027185.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379938064 + 201782025 = 19492^2 + 14205^2 .

It is a cyclic number.

It is not a de Polignac number, because 581720089 - 2¹⁵ = 581687321 is a prime.

It is not a weakly prime, because it can be changed into another prime (581720989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290860044 + 290860045.

It is an arithmetic number, because the mean of its divisors is an integer number (290860045).

Almost surely, 2^581720089 is an apocalyptic number.

It is an amenable number.

581720089 is a deficient number, since it is larger than the sum of its proper divisors (1).

581720089 is an equidigital number, since it uses as much as digits as its factorization.

581720089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 581720089 is about 24118.8741238060. The cubic root of 581720089 is about 834.7786899593.

The spelling of 581720089 in words is "five hundred eighty-one million, seven hundred twenty thousand, eighty-nine".