86572865 has 4 divisors (see below), whose sum is σ = 103887444. Its totient is φ = 69258288.

The previous prime is 86572807. The next prime is 86572867. The reversal of 86572865 is 56827568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63234304 + 23338561 = 7952^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 86572865 - 2²⁰ = 85524289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86572867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657282 + ... + 8657291.

It is an arithmetic number, because the mean of its divisors is an integer number (25971861).

Almost surely, 2^86572865 is an apocalyptic number.

It is an amenable number.

86572865 is a deficient number, since it is larger than the sum of its proper divisors (17314579).

86572865 is a wasteful number, since it uses less digits than its factorization.

86572865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17314578.

The product of its digits is 806400, while the sum is 47.

The square root of 86572865 is about 9304.4540409419. The cubic root of 86572865 is about 442.3784168075.

The spelling of 86572865 in words is "eighty-six million, five hundred seventy-two thousand, eight hundred sixty-five".