573361781 has 2 divisors, whose sum is σ = 573361782. Its totient is φ = 573361780.

The previous prime is 573361751. The next prime is 573361787. The reversal of 573361781 is 187163375.

573361781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370755025 + 202606756 = 19255^2 + 14234^2 .

It is a cyclic number.

It is not a de Polignac number, because 573361781 - 2²⁶ = 506252917 is a prime.

It is a super-2 number, since 2×573361781² = 657487463822983922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (573361787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286680890 + 286680891.

It is an arithmetic number, because the mean of its divisors is an integer number (286680891).

Almost surely, 2^573361781 is an apocalyptic number.

It is an amenable number.

573361781 is a deficient number, since it is larger than the sum of its proper divisors (1).

573361781 is an equidigital number, since it uses as much as digits as its factorization.

573361781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 573361781 is about 23944.9740237905. The cubic root of 573361781 is about 830.7612800532.

The spelling of 573361781 in words is "five hundred seventy-three million, three hundred sixty-one thousand, seven hundred eighty-one".