308081 has 2 divisors, whose sum is σ = 308082. Its totient is φ = 308080.

The previous prime is 308051. The next prime is 308093. The reversal of 308081 is 180803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 58081 = 500^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 308081 - 2⁶ = 308017 is a prime.

It is a super-2 number, since 2×308081² = 189827805122, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308081.

It is not a weakly prime, because it can be changed into another prime (308041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154040 + 154041.

It is an arithmetic number, because the mean of its divisors is an integer number (154041).

2³⁰⁸⁰⁸¹ is an apocalyptic number.

It is an amenable number.

308081 is a deficient number, since it is larger than the sum of its proper divisors (1).

308081 is an equidigital number, since it uses as much as digits as its factorization.

308081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 308081 is about 555.0504481576. The cubic root of 308081 is about 67.5390537605.

Adding to 308081 its reverse (180803), we get a palindrome (488884).

The spelling of 308081 in words is "three hundred eight thousand, eighty-one".