577873661 has 2 divisors, whose sum is σ = 577873662. Its totient is φ = 577873660.

The previous prime is 577873651. The next prime is 577873687. The reversal of 577873661 is 166378775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386908900 + 190964761 = 19670^2 + 13819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-577873661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (577873651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288936830 + 288936831.

It is an arithmetic number, because the mean of its divisors is an integer number (288936831).

Almost surely, 2^577873661 is an apocalyptic number.

It is an amenable number.

577873661 is a deficient number, since it is larger than the sum of its proper divisors (1).

577873661 is an equidigital number, since it uses as much as digits as its factorization.

577873661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 50.

The square root of 577873661 is about 24039.0029119346. The cubic root of 577873661 is about 832.9347221970.

The spelling of 577873661 in words is "five hundred seventy-seven million, eight hundred seventy-three thousand, six hundred sixty-one".