86312609 has 2 divisors, whose sum is σ = 86312610. Its totient is φ = 86312608.

The previous prime is 86312599. The next prime is 86312627. The reversal of 86312609 is 90621368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68840209 + 17472400 = 8297^2 + 4180^2 .

It is a cyclic number.

It is not a de Polignac number, because 86312609 - 2⁴ = 86312593 is a prime.

It is not a weakly prime, because it can be changed into another prime (86312669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43156304 + 43156305.

It is an arithmetic number, because the mean of its divisors is an integer number (43156305).

Almost surely, 2^86312609 is an apocalyptic number.

It is an amenable number.

86312609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86312609 is an equidigital number, since it uses as much as digits as its factorization.

86312609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 86312609 is about 9290.4579542668. The cubic root of 86312609 is about 441.9346780749.

The spelling of 86312609 in words is "eighty-six million, three hundred twelve thousand, six hundred nine".