605111081 has 2 divisors, whose sum is σ = 605111082. Its totient is φ = 605111080.

The previous prime is 605111057. The next prime is 605111083. The reversal of 605111081 is 180111506.

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., 596141056 + 8970025 = 24416^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 605111081 - 2¹⁴ = 605094697 is a prime.

It is a super-3 number, since 3×605111081³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 605111083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (605111083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302555540 + 302555541.

It is an arithmetic number, because the mean of its divisors is an integer number (302555541).

Almost surely, 2^605111081 is an apocalyptic number.

It is an amenable number.

605111081 is a deficient number, since it is larger than the sum of its proper divisors (1).

605111081 is an equidigital number, since it uses as much as digits as its factorization.

605111081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 605111081 is about 24599.0056912876. The cubic root of 605111081 is about 845.8208151080.

Adding to 605111081 its reverse (180111506), we get a palindrome (785222587).

The spelling of 605111081 in words is "six hundred five million, one hundred eleven thousand, eighty-one".