573099661 has 2 divisors, whose sum is σ = 573099662. Its totient is φ = 573099660.

The previous prime is 573099649. The next prime is 573099701. The reversal of 573099661 is 166990375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365192100 + 207907561 = 19110^2 + 14419^2 .

It is a cyclic number.

It is not a de Polignac number, because 573099661 - 2¹³ = 573091469 is a prime.

It is a Chen prime.

It is the 23940-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (573099601) by changing a digit.

It is a nontrivial repunit in base 23939.

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, 286549830 + 286549831.

It is an arithmetic number, because the mean of its divisors is an integer number (286549831).

Almost surely, 2^573099661 is an apocalyptic number.

It is an amenable number.

573099661 is a deficient number, since it is larger than the sum of its proper divisors (1).

573099661 is an equidigital number, since it uses as much as digits as its factorization.

573099661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 573099661 is about 23939.5000156645. The cubic root of 573099661 is about 830.6346628828.

The spelling of 573099661 in words is "five hundred seventy-three million, ninety-nine thousand, six hundred sixty-one".