556931873 has 2 divisors, whose sum is σ = 556931874. Its totient is φ = 556931872.

The previous prime is 556931839. The next prime is 556931899. The reversal of 556931873 is 378139655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349802209 + 207129664 = 18703^2 + 14392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556931873 is a prime.

It is a super-2 number, since 2×556931873² = 620346222326576258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556931273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278465936 + 278465937.

It is an arithmetic number, because the mean of its divisors is an integer number (278465937).

Almost surely, 2^556931873 is an apocalyptic number.

It is an amenable number.

556931873 is a deficient number, since it is larger than the sum of its proper divisors (1).

556931873 is an equidigital number, since it uses as much as digits as its factorization.

556931873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 556931873 is about 23599.4040814593. The cubic root of 556931873 is about 822.7489897591.

The spelling of 556931873 in words is "five hundred fifty-six million, nine hundred thirty-one thousand, eight hundred seventy-three".