808081 has 2 divisors, whose sum is σ = 808082. Its totient is φ = 808080.

The previous prime is 808039. The next prime is 808097. The reversal of 808081 is 180808.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 7056 = 895^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 808081 - 2¹¹ = 806033 is a prime.

It is a super-2 number, since 2×808081² = 1305989805122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (808021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404040 + 404041.

It is an arithmetic number, because the mean of its divisors is an integer number (404041).

2⁸⁰⁸⁰⁸¹ is an apocalyptic number.

808081 is the 481-st centered heptagonal number.

It is an amenable number.

808081 is a deficient number, since it is larger than the sum of its proper divisors (1).

808081 is an equidigital number, since it uses as much as digits as its factorization.

808081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 808081 is about 898.9332566993. The cubic root of 808081 is about 93.1433024099.

Adding to 808081 its reverse (180808), we get a palindrome (988889).

The spelling of 808081 in words is "eight hundred eight thousand, eighty-one".