605242661 has 2 divisors, whose sum is σ = 605242662. Its totient is φ = 605242660.

The previous prime is 605242639. The next prime is 605242679. The reversal of 605242661 is 166242506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450712900 + 154529761 = 21230^2 + 12431^2 .

It is a cyclic number.

It is not a de Polignac number, because 605242661 - 2¹⁴ = 605226277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605242681) 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, 302621330 + 302621331.

It is an arithmetic number, because the mean of its divisors is an integer number (302621331).

Almost surely, 2^605242661 is an apocalyptic number.

It is an amenable number.

605242661 is a deficient number, since it is larger than the sum of its proper divisors (1).

605242661 is an equidigital number, since it uses as much as digits as its factorization.

605242661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 605242661 is about 24601.6800442571. The cubic root of 605242661 is about 845.8821179225.

The spelling of 605242661 in words is "six hundred five million, two hundred forty-two thousand, six hundred sixty-one".