86650909 has 2 divisors, whose sum is σ = 86650910. Its totient is φ = 86650908.

The previous prime is 86650903. The next prime is 86650931. The reversal of 86650909 is 90905668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 42055225 = 6678^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 86650909 - 2³ = 86650901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86650901) 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, 43325454 + 43325455.

It is an arithmetic number, because the mean of its divisors is an integer number (43325455).

Almost surely, 2^86650909 is an apocalyptic number.

It is an amenable number.

86650909 is a deficient number, since it is larger than the sum of its proper divisors (1).

86650909 is an equidigital number, since it uses as much as digits as its factorization.

86650909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 86650909 is about 9308.6470015787. The cubic root of 86650909 is about 442.5113091474.

The spelling of 86650909 in words is "eighty-six million, six hundred fifty thousand, nine hundred nine".