556478869 has 2 divisors, whose sum is σ = 556478870. Its totient is φ = 556478868.

The previous prime is 556478863. The next prime is 556478887. The reversal of 556478869 is 968874655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555167844 + 1311025 = 23562^2 + 1145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556478869 is a prime.

It is a super-2 number, since 2×556478869² = 619337463287038322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556478863) 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, 278239434 + 278239435.

It is an arithmetic number, because the mean of its divisors is an integer number (278239435).

Almost surely, 2^556478869 is an apocalyptic number.

It is an amenable number.

556478869 is a deficient number, since it is larger than the sum of its proper divisors (1).

556478869 is an equidigital number, since it uses as much as digits as its factorization.

556478869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 58.

The square root of 556478869 is about 23589.8043442501. The cubic root of 556478869 is about 822.5258567334.

It can be divided in two parts, 55647 and 8869, that added together give a square (64516 = 254²).

The spelling of 556478869 in words is "five hundred fifty-six million, four hundred seventy-eight thousand, eight hundred sixty-nine".