8505941897 has 2 divisors, whose sum is σ = 8505941898. Its totient is φ = 8505941896.

The previous prime is 8505941893. The next prime is 8505941921. The reversal of 8505941897 is 7981495058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6816814096 + 1689127801 = 82564^2 + 41099^2 .

It is a cyclic number.

It is not a de Polignac number, because 8505941897 - 2² = 8505941893 is a prime.

It is not a weakly prime, because it can be changed into another prime (8505941893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252970948 + 4252970949.

It is an arithmetic number, because the mean of its divisors is an integer number (4252970949).

Almost surely, 2^8505941897 is an apocalyptic number.

It is an amenable number.

8505941897 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505941897 is an equidigital number, since it uses as much as digits as its factorization.

8505941897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The square root of 8505941897 is about 92227.6634042086. The cubic root of 8505941897 is about 2041.3029847847.

The spelling of 8505941897 in words is "eight billion, five hundred five million, nine hundred forty-one thousand, eight hundred ninety-seven".