86866229 has 2 divisors, whose sum is σ = 86866230. Its totient is φ = 86866228.

The previous prime is 86866217. The next prime is 86866253. The reversal of 86866229 is 92266868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 36881329 = 7070^2 + 6073^2 .

It is a cyclic number.

It is not a de Polignac number, because 86866229 - 2¹² = 86862133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86866279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43433114 + 43433115.

It is an arithmetic number, because the mean of its divisors is an integer number (43433115).

Almost surely, 2^86866229 is an apocalyptic number.

It is an amenable number.

86866229 is a deficient number, since it is larger than the sum of its proper divisors (1).

86866229 is an equidigital number, since it uses as much as digits as its factorization.

86866229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 86866229 is about 9320.2054161912. The cubic root of 86866229 is about 442.8775400496.

The spelling of 86866229 in words is "eighty-six million, eight hundred sixty-six thousand, two hundred twenty-nine".