86318909 has 2 divisors, whose sum is σ = 86318910. Its totient is φ = 86318908.

The previous prime is 86318887. The next prime is 86318959. The reversal of 86318909 is 90981368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 34550884 = 7195^2 + 5878^2 .

It is a cyclic number.

It is not a de Polignac number, because 86318909 - 2¹⁶ = 86253373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86318909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86318959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43159454 + 43159455.

It is an arithmetic number, because the mean of its divisors is an integer number (43159455).

Almost surely, 2^86318909 is an apocalyptic number.

It is an amenable number.

86318909 is a deficient number, since it is larger than the sum of its proper divisors (1).

86318909 is an equidigital number, since it uses as much as digits as its factorization.

86318909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 86318909 is about 9290.7970056395. The cubic root of 86318909 is about 441.9454301569.

The spelling of 86318909 in words is "eighty-six million, three hundred eighteen thousand, nine hundred nine".