86159709 has 12 divisors (see below), whose sum is σ = 125174556. Its totient is φ = 57106752.

The previous prime is 86159701. The next prime is 86159713. The reversal of 86159709 is 90795168.

It can be written as a sum of positive squares in 2 ways, for example, as 57836025 + 28323684 = 7605^2 + 5322^2 .

It is not a de Polignac number, because 86159709 - 2³ = 86159701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86159701) 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 in 11 ways as a sum of consecutive naturals, for example, 26112 + ... + 29225.

It is an arithmetic number, because the mean of its divisors is an integer number (10431213).

Almost surely, 2^86159709 is an apocalyptic number.

It is an amenable number.

86159709 is a deficient number, since it is larger than the sum of its proper divisors (39014847).

86159709 is a wasteful number, since it uses less digits than its factorization.

86159709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55516 (or 55513 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 86159709 is about 9282.2254335908. The cubic root of 86159709 is about 441.6735661594.

It can be divided in two parts, 86159 and 709, that added together give a palindrome (86868).

The spelling of 86159709 in words is "eighty-six million, one hundred fifty-nine thousand, seven hundred nine".