806040581 has 2 divisors, whose sum is σ = 806040582. Its totient is φ = 806040580.

The previous prime is 806040577. The next prime is 806040623. The reversal of 806040581 is 185040608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711075556 + 94965025 = 26666^2 + 9745^2 .

It is a cyclic number.

It is not a de Polignac number, because 806040581 - 2² = 806040577 is a prime.

It is a super-2 number, since 2×806040581² = 1299402836437635122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806040541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403020290 + 403020291.

It is an arithmetic number, because the mean of its divisors is an integer number (403020291).

Almost surely, 2^806040581 is an apocalyptic number.

It is an amenable number.

806040581 is a deficient number, since it is larger than the sum of its proper divisors (1).

806040581 is an equidigital number, since it uses as much as digits as its factorization.

806040581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 806040581 is about 28390.8538265407. The cubic root of 806040581 is about 930.6484016428.

The spelling of 806040581 in words is "eight hundred six million, forty thousand, five hundred eighty-one".