80008081 has 2 divisors, whose sum is σ = 80008082. Its totient is φ = 80008080.

The previous prime is 80008067. The next prime is 80008091. The reversal of 80008081 is 18080008.

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., 62157456 + 17850625 = 7884^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 80008081 - 2¹¹ = 80006033 is a prime.

It is a super-2 number, since 2×80008081² = 12802586050605122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80008051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40004040 + 40004041.

It is an arithmetic number, because the mean of its divisors is an integer number (40004041).

Almost surely, 2^80008081 is an apocalyptic number.

It is an amenable number.

80008081 is a deficient number, since it is larger than the sum of its proper divisors (1).

80008081 is an equidigital number, since it uses as much as digits as its factorization.

80008081 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 80008081 is about 8944.7236402250. The cubic root of 80008081 is about 430.9014458402.

Adding to 80008081 its reverse (18080008), we get a palindrome (98088089).

The spelling of 80008081 in words is "eighty million, eight thousand, eighty-one".