555560813 has 2 divisors, whose sum is σ = 555560814. Its totient is φ = 555560812.

The previous prime is 555560777. The next prime is 555560839. The reversal of 555560813 is 318065555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527023849 + 28536964 = 22957^2 + 5342^2 .

It is a cyclic number.

It is not a de Polignac number, because 555560813 - 2⁸ = 555560557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555560843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277780406 + 277780407.

It is an arithmetic number, because the mean of its divisors is an integer number (277780407).

Almost surely, 2^555560813 is an apocalyptic number.

It is an amenable number.

555560813 is a deficient number, since it is larger than the sum of its proper divisors (1).

555560813 is an equidigital number, since it uses as much as digits as its factorization.

555560813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 555560813 is about 23570.3375665263. The cubic root of 555560813 is about 822.0732846299.

The spelling of 555560813 in words is "five hundred fifty-five million, five hundred sixty thousand, eight hundred thirteen".