577968821 has 2 divisors, whose sum is σ = 577968822. Its totient is φ = 577968820.

The previous prime is 577968803. The next prime is 577968893. The reversal of 577968821 is 128869775.

577968821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575328196 + 2640625 = 23986^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 577968821 - 2²⁶ = 510859957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (577968121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288984410 + 288984411.

It is an arithmetic number, because the mean of its divisors is an integer number (288984411).

Almost surely, 2^577968821 is an apocalyptic number.

It is an amenable number.

577968821 is a deficient number, since it is larger than the sum of its proper divisors (1).

577968821 is an equidigital number, since it uses as much as digits as its factorization.

577968821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 53.

The square root of 577968821 is about 24040.9821138821. The cubic root of 577968821 is about 832.9804402164.

The spelling of 577968821 in words is "five hundred seventy-seven million, nine hundred sixty-eight thousand, eight hundred twenty-one".