86078609 has 2 divisors, whose sum is σ = 86078610. Its totient is φ = 86078608.

The previous prime is 86078593. The next prime is 86078617. The reversal of 86078609 is 90687068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78499600 + 7579009 = 8860^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 86078609 - 2⁴ = 86078593 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86078609.

It is not a weakly prime, because it can be changed into another prime (86074609) 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, 43039304 + 43039305.

It is an arithmetic number, because the mean of its divisors is an integer number (43039305).

Almost surely, 2^86078609 is an apocalyptic number.

It is an amenable number.

86078609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86078609 is an equidigital number, since it uses as much as digits as its factorization.

86078609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 86078609 is about 9277.8558406563. The cubic root of 86078609 is about 441.5349438603.

The spelling of 86078609 in words is "eighty-six million, seventy-eight thousand, six hundred nine".