556722689 has 2 divisors, whose sum is σ = 556722690. Its totient is φ = 556722688.

The previous prime is 556722611. The next prime is 556722697. The reversal of 556722689 is 986227655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313113025 + 243609664 = 17695^2 + 15608^2 .

It is a cyclic number.

It is not a de Polignac number, because 556722689 - 2⁸ = 556722433 is a prime.

It is not a weakly prime, because it can be changed into another prime (556742689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278361344 + 278361345.

It is an arithmetic number, because the mean of its divisors is an integer number (278361345).

Almost surely, 2^556722689 is an apocalyptic number.

It is an amenable number.

556722689 is a deficient number, since it is larger than the sum of its proper divisors (1).

556722689 is an equidigital number, since it uses as much as digits as its factorization.

556722689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 556722689 is about 23594.9716889002. The cubic root of 556722689 is about 822.6459684949.

The spelling of 556722689 in words is "five hundred fifty-six million, seven hundred twenty-two thousand, six hundred eighty-nine".