581085091 has 2 divisors, whose sum is σ = 581085092. Its totient is φ = 581085090.

The previous prime is 581085077. The next prime is 581085107. The reversal of 581085091 is 190580185.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 581085091 - 2¹⁷ = 580954019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 581085091.

It is not a weakly prime, because it can be changed into another prime (581085031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290542545 + 290542546.

It is an arithmetic number, because the mean of its divisors is an integer number (290542546).

Almost surely, 2^581085091 is an apocalyptic number.

581085091 is a deficient number, since it is larger than the sum of its proper divisors (1).

581085091 is an equidigital number, since it uses as much as digits as its factorization.

581085091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 581085091 is about 24105.7066065278. The cubic root of 581085091 is about 834.4748348906.

The spelling of 581085091 in words is "five hundred eighty-one million, eighty-five thousand, ninety-one".