86389609 has 2 divisors, whose sum is σ = 86389610. Its totient is φ = 86389608.

The previous prime is 86389607. The next prime is 86389669. The reversal of 86389609 is 90698368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50808384 + 35581225 = 7128^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 86389609 - 2¹ = 86389607 is a prime.

Together with 86389607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86389607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43194804 + 43194805.

It is an arithmetic number, because the mean of its divisors is an integer number (43194805).

Almost surely, 2^86389609 is an apocalyptic number.

It is an amenable number.

86389609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86389609 is an equidigital number, since it uses as much as digits as its factorization.

86389609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 86389609 is about 9294.6010672863. The cubic root of 86389609 is about 442.0660565470.

The spelling of 86389609 in words is "eighty-six million, three hundred eighty-nine thousand, six hundred nine".