86650609 has 2 divisors, whose sum is σ = 86650610. Its totient is φ = 86650608.

The previous prime is 86650573. The next prime is 86650639. The reversal of 86650609 is 90605668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85969984 + 680625 = 9272^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 86650609 - 2⁷ = 86650481 is a prime.

It is not a weakly prime, because it can be changed into another prime (86650639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43325304 + 43325305.

It is an arithmetic number, because the mean of its divisors is an integer number (43325305).

Almost surely, 2^86650609 is an apocalyptic number.

It is an amenable number.

86650609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86650609 is an equidigital number, since it uses as much as digits as its factorization.

86650609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 86650609 is about 9308.6308875151. The cubic root of 86650609 is about 442.5107984640.

The spelling of 86650609 in words is "eighty-six million, six hundred fifty thousand, six hundred nine".