86649197 has 2 divisors, whose sum is σ = 86649198. Its totient is φ = 86649196.

The previous prime is 86649193. The next prime is 86649203. The reversal of 86649197 is 79194668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67059721 + 19589476 = 8189^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 86649197 - 2² = 86649193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86649193) 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, 43324598 + 43324599.

It is an arithmetic number, because the mean of its divisors is an integer number (43324599).

Almost surely, 2^86649197 is an apocalyptic number.

It is an amenable number.

86649197 is a deficient number, since it is larger than the sum of its proper divisors (1).

86649197 is an equidigital number, since it uses as much as digits as its factorization.

86649197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 86649197 is about 9308.5550436144. Note that the first 3 decimals coincide. The cubic root of 86649197 is about 442.5083948315.

The spelling of 86649197 in words is "eighty-six million, six hundred forty-nine thousand, one hundred ninety-seven".