86891161 has 32 divisors (see below), whose sum is σ = 108800000. Its totient is φ = 69155856.

The previous prime is 86891159. The next prime is 86891183. The reversal of 86891161 is 16119868.

It is not a de Polignac number, because 86891161 - 2¹ = 86891159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86891561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436540 + ... + 436738.

It is an arithmetic number, because the mean of its divisors is an integer number (3400000).

Almost surely, 2^86891161 is an apocalyptic number.

It is an amenable number.

86891161 is a deficient number, since it is larger than the sum of its proper divisors (21908839).

86891161 is a wasteful number, since it uses less digits than its factorization.

86891161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 292 counting only the distinct ones).

The product of its digits is 20736, while the sum is 40.

The square root of 86891161 is about 9321.5428444008. The cubic root of 86891161 is about 442.9199069806.

It can be divided in two parts, 868 and 91161, that added together give a palindrome (92029).

The spelling of 86891161 in words is "eighty-six million, eight hundred ninety-one thousand, one hundred sixty-one".