86435609 has 8 divisors (see below), whose sum is σ = 93294600. Its totient is φ = 79606656.

The previous prime is 86435593. The next prime is 86435611. The reversal of 86435609 is 90653468.

It can be written as a sum of positive squares in 4 ways, for example, as 26419600 + 60016009 = 5140^2 + 7747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86435609 - 2⁴ = 86435593 is a prime.

It is a super-2 number, since 2×86435609² = 14942229006401762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86435639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334 + ... + 13215.

It is an arithmetic number, because the mean of its divisors is an integer number (11661825).

Almost surely, 2^86435609 is an apocalyptic number.

It is an amenable number.

86435609 is a deficient number, since it is larger than the sum of its proper divisors (6858991).

86435609 is a wasteful number, since it uses less digits than its factorization.

86435609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15019.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 86435609 is about 9297.0752928004. The cubic root of 86435609 is about 442.1445051422.

The spelling of 86435609 in words is "eighty-six million, four hundred thirty-five thousand, six hundred nine".