575247661 has 2 divisors, whose sum is σ = 575247662. Its totient is φ = 575247660.

The previous prime is 575247613. The next prime is 575247677. The reversal of 575247661 is 166742575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352312900 + 222934761 = 18770^2 + 14931^2 .

It is a cyclic number.

It is not a de Polignac number, because 575247661 - 2⁹ = 575247149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (575247061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287623830 + 287623831.

It is an arithmetic number, because the mean of its divisors is an integer number (287623831).

Almost surely, 2^575247661 is an apocalyptic number.

It is an amenable number.

575247661 is a deficient number, since it is larger than the sum of its proper divisors (1).

575247661 is an equidigital number, since it uses as much as digits as its factorization.

575247661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 43.

The square root of 575247661 is about 23984.3211494509. The cubic root of 575247661 is about 831.6711194942.

The spelling of 575247661 in words is "five hundred seventy-five million, two hundred forty-seven thousand, six hundred sixty-one".