86611881 has 4 divisors (see below), whose sum is σ = 115482512. Its totient is φ = 57741252.

The previous prime is 86611849. The next prime is 86611883. The reversal of 86611881 is 18811668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86611881 - 2⁵ = 86611849 is a prime.

It is a super-2 number, since 2×86611881² = 15003235860716322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86611883) 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, 14435311 + ... + 14435316.

It is an arithmetic number, because the mean of its divisors is an integer number (28870628).

Almost surely, 2^86611881 is an apocalyptic number.

It is an amenable number.

86611881 is a deficient number, since it is larger than the sum of its proper divisors (28870631).

86611881 is a wasteful number, since it uses less digits than its factorization.

86611881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28870630.

The product of its digits is 18432, while the sum is 39.

The square root of 86611881 is about 9306.5504350431. The cubic root of 86611881 is about 442.4448627396. Note that the first 3 decimals are identical.

The spelling of 86611881 in words is "eighty-six million, six hundred eleven thousand, eight hundred eighty-one".