556504139 has 2 divisors, whose sum is σ = 556504140. Its totient is φ = 556504138.

The previous prime is 556504073. The next prime is 556504141. The reversal of 556504139 is 931405655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556504139 is a prime.

Together with 556504141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556504189) 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, 278252069 + 278252070.

It is an arithmetic number, because the mean of its divisors is an integer number (278252070).

Almost surely, 2^556504139 is an apocalyptic number.

556504139 is a deficient number, since it is larger than the sum of its proper divisors (1).

556504139 is an equidigital number, since it uses as much as digits as its factorization.

556504139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 556504139 is about 23590.3399509206. The cubic root of 556504139 is about 822.5383069898.

The spelling of 556504139 in words is "five hundred fifty-six million, five hundred four thousand, one hundred thirty-nine".