605817997 has 2 divisors, whose sum is σ = 605817998. Its totient is φ = 605817996.

The previous prime is 605817991. The next prime is 605818039. The reversal of 605817997 is 799718506.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324216036 + 281601961 = 18006^2 + 16781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605817997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605817991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302908998 + 302908999.

It is an arithmetic number, because the mean of its divisors is an integer number (302908999).

Almost surely, 2^605817997 is an apocalyptic number.

It is an amenable number.

605817997 is a deficient number, since it is larger than the sum of its proper divisors (1).

605817997 is an equidigital number, since it uses as much as digits as its factorization.

605817997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 605817997 is about 24613.3702893366. The cubic root of 605817997 is about 846.1500613115.

The spelling of 605817997 in words is "six hundred five million, eight hundred seventeen thousand, nine hundred ninety-seven".