86856197 has 2 divisors, whose sum is σ = 86856198. Its totient is φ = 86856196.

The previous prime is 86856193. The next prime is 86856221. The reversal of 86856197 is 79165868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45819361 + 41036836 = 6769^2 + 6406^2 .

It is a cyclic number.

It is not a de Polignac number, because 86856197 - 2² = 86856193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86856193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43428098 + 43428099.

It is an arithmetic number, because the mean of its divisors is an integer number (43428099).

Almost surely, 2^86856197 is an apocalyptic number.

It is an amenable number.

86856197 is a deficient number, since it is larger than the sum of its proper divisors (1).

86856197 is an equidigital number, since it uses as much as digits as its factorization.

86856197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 86856197 is about 9319.6672150887. The cubic root of 86856197 is about 442.8604903914.

The spelling of 86856197 in words is "eighty-six million, eight hundred fifty-six thousand, one hundred ninety-seven".