556106123 has 2 divisors, whose sum is σ = 556106124. Its totient is φ = 556106122.

The previous prime is 556106099. The next prime is 556106137. The reversal of 556106123 is 321601655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556106123 - 2²⁸ = 287670667 is a prime.

It is a super-2 number, since 2×556106123² = 618508040076182258, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (556106183) 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, 278053061 + 278053062.

It is an arithmetic number, because the mean of its divisors is an integer number (278053062).

Almost surely, 2^556106123 is an apocalyptic number.

556106123 is a deficient number, since it is larger than the sum of its proper divisors (1).

556106123 is an equidigital number, since it uses as much as digits as its factorization.

556106123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 556106123 is about 23581.9024465797. The cubic root of 556106123 is about 822.3421650004.

Adding to 556106123 its reverse (321601655), we get a palindrome (877707778).

The spelling of 556106123 in words is "five hundred fifty-six million, one hundred six thousand, one hundred twenty-three".