556659947 has 2 divisors, whose sum is σ = 556659948. Its totient is φ = 556659946.

The previous prime is 556659913. The next prime is 556660009. The reversal of 556659947 is 749956655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556659947 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 556659892 and 556659901.

It is not a weakly prime, because it can be changed into another prime (556659247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278329973 + 278329974.

It is an arithmetic number, because the mean of its divisors is an integer number (278329974).

Almost surely, 2^556659947 is an apocalyptic number.

556659947 is a deficient number, since it is larger than the sum of its proper divisors (1).

556659947 is an equidigital number, since it uses as much as digits as its factorization.

556659947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206000, while the sum is 56.

The square root of 556659947 is about 23593.6420884949. The cubic root of 556659947 is about 822.6150635857.

The spelling of 556659947 in words is "five hundred fifty-six million, six hundred fifty-nine thousand, nine hundred forty-seven".