86381081 has 2 divisors, whose sum is σ = 86381082. Its totient is φ = 86381080.

The previous prime is 86381069. The next prime is 86381101. The reversal of 86381081 is 18018368.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83083225 + 3297856 = 9115^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 86381081 - 2⁶ = 86381017 is a prime.

It is a super-2 number, since 2×86381081² = 14923382309457122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86381021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43190540 + 43190541.

It is an arithmetic number, because the mean of its divisors is an integer number (43190541).

Almost surely, 2^86381081 is an apocalyptic number.

It is an amenable number.

86381081 is a deficient number, since it is larger than the sum of its proper divisors (1).

86381081 is an equidigital number, since it uses as much as digits as its factorization.

86381081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 86381081 is about 9294.1422950157. The cubic root of 86381081 is about 442.0515097999.

The spelling of 86381081 in words is "eighty-six million, three hundred eighty-one thousand, eighty-one".