806905577 has 2 divisors, whose sum is σ = 806905578. Its totient is φ = 806905576.

The previous prime is 806905571. The next prime is 806905639. The reversal of 806905577 is 775509608.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458859241 + 348046336 = 21421^2 + 18656^2 .

It is a cyclic number.

It is not a de Polignac number, because 806905577 - 2¹⁸ = 806643433 is a prime.

It is a super-2 number, since 2×806905577² = 1302193220387405858, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (806905571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403452788 + 403452789.

It is an arithmetic number, because the mean of its divisors is an integer number (403452789).

Almost surely, 2^806905577 is an apocalyptic number.

It is an amenable number.

806905577 is a deficient number, since it is larger than the sum of its proper divisors (1).

806905577 is an equidigital number, since it uses as much as digits as its factorization.

806905577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 806905577 is about 28406.0834505569. The cubic root of 806905577 is about 930.9811885905.

The spelling of 806905577 in words is "eight hundred six million, nine hundred five thousand, five hundred seventy-seven".