86504609 has 2 divisors, whose sum is σ = 86504610. Its totient is φ = 86504608.

The previous prime is 86504603. The next prime is 86504611. The reversal of 86504609 is 90640568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 107584 = 9295^2 + 328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86504609 is a prime.

It is a Sophie Germain prime.

Together with 86504611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86504603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43252304 + 43252305.

It is an arithmetic number, because the mean of its divisors is an integer number (43252305).

Almost surely, 2^86504609 is an apocalyptic number.

It is an amenable number.

86504609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86504609 is an equidigital number, since it uses as much as digits as its factorization.

86504609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 86504609 is about 9300.7853969436. The cubic root of 86504609 is about 442.2621258652.

The spelling of 86504609 in words is "eighty-six million, five hundred four thousand, six hundred nine".