55663189 has 2 divisors, whose sum is σ = 55663190. Its totient is φ = 55663188.

The previous prime is 55663183. The next prime is 55663193. The reversal of 55663189 is 98136655.

55663189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49463089 + 6200100 = 7033^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 55663189 - 2⁷ = 55663061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55663183) 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, 27831594 + 27831595.

It is an arithmetic number, because the mean of its divisors is an integer number (27831595).

Almost surely, 2^55663189 is an apocalyptic number.

It is an amenable number.

55663189 is a deficient number, since it is larger than the sum of its proper divisors (1).

55663189 is an equidigital number, since it uses as much as digits as its factorization.

55663189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 55663189 is about 7460.7767021939. The cubic root of 55663189 is about 381.8176742916.

The spelling of 55663189 in words is "fifty-five million, six hundred sixty-three thousand, one hundred eighty-nine".