556321613 has 2 divisors, whose sum is σ = 556321614. Its totient is φ = 556321612.

The previous prime is 556321607. The next prime is 556321639. The reversal of 556321613 is 316123655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288082729 + 268238884 = 16973^2 + 16378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556321613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556321613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556321663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278160806 + 278160807.

It is an arithmetic number, because the mean of its divisors is an integer number (278160807).

Almost surely, 2^556321613 is an apocalyptic number.

It is an amenable number.

556321613 is a deficient number, since it is larger than the sum of its proper divisors (1).

556321613 is an equidigital number, since it uses as much as digits as its factorization.

556321613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 556321613 is about 23586.4709738443. The cubic root of 556321613 is about 822.4483699264.

The spelling of 556321613 in words is "five hundred fifty-six million, three hundred twenty-one thousand, six hundred thirteen".