868081 has 2 divisors, whose sum is σ = 868082. Its totient is φ = 868080.

The previous prime is 868073. The next prime is 868103. The reversal of 868081 is 180868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 58081 = 900^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 868081 - 2³ = 868073 is a prime.

It is a super-2 number, since 2×868081² = 1507129245122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (868051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434040 + 434041.

It is an arithmetic number, because the mean of its divisors is an integer number (434041).

2⁸⁶⁸⁰⁸¹ is an apocalyptic number.

It is an amenable number.

868081 is a deficient number, since it is larger than the sum of its proper divisors (1).

868081 is an equidigital number, since it uses as much as digits as its factorization.

868081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 868081 is about 931.7086454466. The cubic root of 868081 is about 95.3937855888.

The spelling of 868081 in words is "eight hundred sixty-eight thousand, eighty-one".