86847881 has 8 divisors (see below), whose sum is σ = 90187944. Its totient is φ = 83566080.

The previous prime is 86847863. The next prime is 86847907. The reversal of 86847881 is 18874868.

It can be written as a sum of positive squares in 4 ways, for example, as 60025 + 86787856 = 245^2 + 9316^2 .

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 86847881 - 2¹⁰ = 86846857 is a prime.

It is a super-2 number, since 2×86847881² = 15085108868380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86847851) 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, 11516 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (11273493).

Almost surely, 2^86847881 is an apocalyptic number.

It is an amenable number.

86847881 is a deficient number, since it is larger than the sum of its proper divisors (3340063).

86847881 is a wasteful number, since it uses less digits than its factorization.

86847881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29131.

The product of its digits is 688128, while the sum is 50.

The square root of 86847881 is about 9319.2210511394. The cubic root of 86847881 is about 442.8463561269.

The spelling of 86847881 in words is "eighty-six million, eight hundred forty-seven thousand, eight hundred eighty-one".