8509166297 has 2 divisors, whose sum is σ = 8509166298. Its totient is φ = 8509166296.

The previous prime is 8509166293. The next prime is 8509166401. The reversal of 8509166297 is 7926619058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8362005136 + 147161161 = 91444^2 + 12131^2 .

It is a cyclic number.

It is not a de Polignac number, because 8509166297 - 2² = 8509166293 is a prime.

It is a super-2 number, since 2×8509166297² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8509166293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4254583148 + 4254583149.

It is an arithmetic number, because the mean of its divisors is an integer number (4254583149).

Almost surely, 2^8509166297 is an apocalyptic number.

It is an amenable number.

8509166297 is a deficient number, since it is larger than the sum of its proper divisors (1).

8509166297 is an equidigital number, since it uses as much as digits as its factorization.

8509166297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 8509166297 is about 92245.1424032724. The cubic root of 8509166297 is about 2041.5608886480.

The spelling of 8509166297 in words is "eight billion, five hundred nine million, one hundred sixty-six thousand, two hundred ninety-seven".