86513569 has 2 divisors, whose sum is σ = 86513570. Its totient is φ = 86513568.

The previous prime is 86513563. The next prime is 86513573. The reversal of 86513569 is 96531568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51265600 + 35247969 = 7160^2 + 5937^2 .

It is a cyclic number.

It is not a de Polignac number, because 86513569 - 2²³ = 78124961 is a prime.

It is a super-2 number, since 2×86513569² = 14969195242235522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86513563) 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, 43256784 + 43256785.

It is an arithmetic number, because the mean of its divisors is an integer number (43256785).

Almost surely, 2^86513569 is an apocalyptic number.

It is an amenable number.

86513569 is a deficient number, since it is larger than the sum of its proper divisors (1).

86513569 is an equidigital number, since it uses as much as digits as its factorization.

86513569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 86513569 is about 9301.2670642230. The cubic root of 86513569 is about 442.2773949238.

The spelling of 86513569 in words is "eighty-six million, five hundred thirteen thousand, five hundred sixty-nine".