556438139 has 2 divisors, whose sum is σ = 556438140. Its totient is φ = 556438138.

The previous prime is 556438117. The next prime is 556438163. The reversal of 556438139 is 931834655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556438139 - 2⁸ = 556437883 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556438139.

It is not a weakly prime, because it can be changed into another prime (556438739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278219069 + 278219070.

It is an arithmetic number, because the mean of its divisors is an integer number (278219070).

Almost surely, 2^556438139 is an apocalyptic number.

556438139 is a deficient number, since it is larger than the sum of its proper divisors (1).

556438139 is an equidigital number, since it uses as much as digits as its factorization.

556438139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 556438139 is about 23588.9410317632. The cubic root of 556438139 is about 822.5057887084.

The spelling of 556438139 in words is "five hundred fifty-six million, four hundred thirty-eight thousand, one hundred thirty-nine".