86539881 has 8 divisors (see below), whose sum is σ = 115439040. Its totient is φ = 57666992.

The previous prime is 86539853. The next prime is 86539897. The reversal of 86539881 is 18893568.

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 86539881 - 2⁷ = 86539753 is a prime.

It is a super-2 number, since 2×86539881² = 14978302006988322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86539881.

It is not an unprimeable number, because it can be changed into a prime (86539801) 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, 3196 + ... + 13538.

It is an arithmetic number, because the mean of its divisors is an integer number (14429880).

Almost surely, 2^86539881 is an apocalyptic number.

It is an amenable number.

86539881 is a deficient number, since it is larger than the sum of its proper divisors (28899159).

86539881 is a wasteful number, since it uses less digits than its factorization.

86539881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135.

The product of its digits is 414720, while the sum is 48.

The square root of 86539881 is about 9302.6813876430. The cubic root of 86539881 is about 442.3222280576.

The spelling of 86539881 in words is "eighty-six million, five hundred thirty-nine thousand, eight hundred eighty-one".