805594649 has 2 divisors, whose sum is σ = 805594650. Its totient is φ = 805594648.

The previous prime is 805594631. The next prime is 805594703. The reversal of 805594649 is 946495508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601819024 + 203775625 = 24532^2 + 14275^2 .

It is a cyclic number.

It is not a de Polignac number, because 805594649 - 2¹² = 805590553 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 805594597 and 805594606.

It is not a weakly prime, because it can be changed into another prime (805594949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402797324 + 402797325.

It is an arithmetic number, because the mean of its divisors is an integer number (402797325).

Almost surely, 2^805594649 is an apocalyptic number.

It is an amenable number.

805594649 is a deficient number, since it is larger than the sum of its proper divisors (1).

805594649 is an equidigital number, since it uses as much as digits as its factorization.

805594649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 805594649 is about 28382.9992953528. Note that the first 3 decimals coincide. The cubic root of 805594649 is about 930.4767467374.

The spelling of 805594649 in words is "eight hundred five million, five hundred ninety-four thousand, six hundred forty-nine".