8505393161 has 2 divisors, whose sum is σ = 8505393162. Its totient is φ = 8505393160.

The previous prime is 8505393139. The next prime is 8505393173. The reversal of 8505393161 is 1613935058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5294017600 + 3211375561 = 72760^2 + 56669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8505393161 is a prime.

It is not a weakly prime, because it can be changed into another prime (8505393101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252696580 + 4252696581.

It is an arithmetic number, because the mean of its divisors is an integer number (4252696581).

Almost surely, 2^8505393161 is an apocalyptic number.

It is an amenable number.

8505393161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505393161 is an equidigital number, since it uses as much as digits as its factorization.

8505393161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 8505393161 is about 92224.6884570504. The cubic root of 8505393161 is about 2041.2590876072.

The spelling of 8505393161 in words is "eight billion, five hundred five million, three hundred ninety-three thousand, one hundred sixty-one".