86600009 has 2 divisors, whose sum is σ = 86600010. Its totient is φ = 86600008.

The previous prime is 86599999. The next prime is 86600011. The reversal of 86600009 is 90000668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47224384 + 39375625 = 6872^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 86600009 - 2²⁴ = 69822793 is a prime.

Together with 86600011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86600069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43300004 + 43300005.

It is an arithmetic number, because the mean of its divisors is an integer number (43300005).

Almost surely, 2^86600009 is an apocalyptic number.

It is an amenable number.

86600009 is a deficient number, since it is larger than the sum of its proper divisors (1).

86600009 is an equidigital number, since it uses as much as digits as its factorization.

86600009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 86600009 is about 9305.9125828690. The cubic root of 86600009 is about 442.4246463237.

The spelling of 86600009 in words is "eighty-six million, six hundred thousand, nine".