56000004989 has 2 divisors, whose sum is σ = 56000004990. Its totient is φ = 56000004988.

The previous prime is 56000004979. The next prime is 56000005049. The reversal of 56000004989 is 98940000065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29681432089 + 26318572900 = 172283^2 + 162230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56000004989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56000004919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28000002494 + 28000002495.

It is an arithmetic number, because the mean of its divisors is an integer number (28000002495).

Almost surely, 2^56000004989 is an apocalyptic number.

It is an amenable number.

56000004989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56000004989 is an equidigital number, since it uses as much as digits as its factorization.

56000004989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 56000004989 in words is "fifty-six billion, four thousand, nine hundred eighty-nine".