556689613 has 2 divisors, whose sum is σ = 556689614. Its totient is φ = 556689612.

The previous prime is 556689589. The next prime is 556689643. The reversal of 556689613 is 316986655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432099369 + 124590244 = 20787^2 + 11162^2 .

It is a cyclic number.

It is not a de Polignac number, because 556689613 - 2²⁵ = 523135181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556689643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278344806 + 278344807.

It is an arithmetic number, because the mean of its divisors is an integer number (278344807).

Almost surely, 2^556689613 is an apocalyptic number.

It is an amenable number.

556689613 is a deficient number, since it is larger than the sum of its proper divisors (1).

556689613 is an equidigital number, since it uses as much as digits as its factorization.

556689613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 49.

The square root of 556689613 is about 23594.2707664382. The cubic root of 556689613 is about 822.6296764956.

The spelling of 556689613 in words is "five hundred fifty-six million, six hundred eighty-nine thousand, six hundred thirteen".