8649573197 has 2 divisors, whose sum is σ = 8649573198. Its totient is φ = 8649573196.

The previous prime is 8649573187. The next prime is 8649573203. The reversal of 8649573197 is 7913759468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8498258596 + 151314601 = 92186^2 + 12301^2 .

It is a cyclic number.

It is not a de Polignac number, because 8649573197 - 2⁶ = 8649573133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8649573187) 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, 4324786598 + 4324786599.

It is an arithmetic number, because the mean of its divisors is an integer number (4324786599).

Almost surely, 2^8649573197 is an apocalyptic number.

It is an amenable number.

8649573197 is a deficient number, since it is larger than the sum of its proper divisors (1).

8649573197 is an equidigital number, since it uses as much as digits as its factorization.

8649573197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 59.

The square root of 8649573197 is about 93003.0816532442. The cubic root of 8649573197 is about 2052.7287237116.

The spelling of 8649573197 in words is "eight billion, six hundred forty-nine million, five hundred seventy-three thousand, one hundred ninety-seven".