86948209 has 2 divisors, whose sum is σ = 86948210. Its totient is φ = 86948208.

The previous prime is 86948153. The next prime is 86948219. The reversal of 86948209 is 90284968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 10909809 = 8720^2 + 3303^2 .

It is a cyclic number.

It is not a de Polignac number, because 86948209 - 2²⁵ = 53393777 is a prime.

It is not a weakly prime, because it can be changed into another prime (86948219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43474104 + 43474105.

It is an arithmetic number, because the mean of its divisors is an integer number (43474105).

Almost surely, 2^86948209 is an apocalyptic number.

It is an amenable number.

86948209 is a deficient number, since it is larger than the sum of its proper divisors (1).

86948209 is an equidigital number, since it uses as much as digits as its factorization.

86948209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 86948209 is about 9324.6023507708. The cubic root of 86948209 is about 443.0168181309.

The spelling of 86948209 in words is "eighty-six million, nine hundred forty-eight thousand, two hundred nine".