86579281 has 4 divisors (see below), whose sum is σ = 87160500. Its totient is φ = 85998064.

The previous prime is 86579279. The next prime is 86579287. The reversal of 86579281 is 18297568.

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 4060225 + 82519056 = 2015^2 + 9084^2 .

It is a cyclic number.

It is not a de Polignac number, because 86579281 - 2¹ = 86579279 is a prime.

It is a super-2 number, since 2×86579281² = 14991943796953922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86579287) 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, 290386 + ... + 290683.

It is an arithmetic number, because the mean of its divisors is an integer number (21790125).

Almost surely, 2^86579281 is an apocalyptic number.

It is an amenable number.

86579281 is a deficient number, since it is larger than the sum of its proper divisors (581219).

86579281 is a wasteful number, since it uses less digits than its factorization.

86579281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581218.

The product of its digits is 241920, while the sum is 46.

The square root of 86579281 is about 9304.7988156650. The cubic root of 86579281 is about 442.3893449038.

The spelling of 86579281 in words is "eighty-six million, five hundred seventy-nine thousand, two hundred eighty-one".