86818117 has 2 divisors, whose sum is σ = 86818118. Its totient is φ = 86818116.

The previous prime is 86818103. The next prime is 86818153. The reversal of 86818117 is 71181868.

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., 57289761 + 29528356 = 7569^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 86818117 - 2¹¹ = 86816069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86818117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86818177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43409058 + 43409059.

It is an arithmetic number, because the mean of its divisors is an integer number (43409059).

Almost surely, 2^86818117 is an apocalyptic number.

It is an amenable number.

86818117 is a deficient number, since it is larger than the sum of its proper divisors (1).

86818117 is an equidigital number, since it uses as much as digits as its factorization.

86818117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 40.

The square root of 86818117 is about 9317.6239997115. The cubic root of 86818117 is about 442.7957604385.

The spelling of 86818117 in words is "eighty-six million, eight hundred eighteen thousand, one hundred seventeen".