556491473 has 2 divisors, whose sum is σ = 556491474. Its totient is φ = 556491472.

The previous prime is 556491451. The next prime is 556491479. The reversal of 556491473 is 374194655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377252929 + 179238544 = 19423^2 + 13388^2 .

It is a cyclic number.

It is not a de Polignac number, because 556491473 - 2⁶ = 556491409 is a prime.

It is not a weakly prime, because it can be changed into another prime (556491479) 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, 278245736 + 278245737.

It is an arithmetic number, because the mean of its divisors is an integer number (278245737).

Almost surely, 2^556491473 is an apocalyptic number.

It is an amenable number.

556491473 is a deficient number, since it is larger than the sum of its proper divisors (1).

556491473 is an equidigital number, since it uses as much as digits as its factorization.

556491473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The square root of 556491473 is about 23590.0714920494. The cubic root of 556491473 is about 822.5320666354.

The spelling of 556491473 in words is "five hundred fifty-six million, four hundred ninety-one thousand, four hundred seventy-three".