556478887 has 2 divisors, whose sum is σ = 556478888. Its totient is φ = 556478886.

The previous prime is 556478869. The next prime is 556478891. The reversal of 556478887 is 788874655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556478887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556478987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278239443 + 278239444.

It is an arithmetic number, because the mean of its divisors is an integer number (278239444).

Almost surely, 2^556478887 is an apocalyptic number.

556478887 is a deficient number, since it is larger than the sum of its proper divisors (1).

556478887 is an equidigital number, since it uses as much as digits as its factorization.

556478887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15052800, while the sum is 58.

The square root of 556478887 is about 23589.8047257708. The cubic root of 556478887 is about 822.5258656020.

The spelling of 556478887 in words is "five hundred fifty-six million, four hundred seventy-eight thousand, eight hundred eighty-seven".