54578189 has 2 divisors, whose sum is σ = 54578190. Its totient is φ = 54578188.

The previous prime is 54578179. The next prime is 54578191. The reversal of 54578189 is 98187545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52809289 + 1768900 = 7267^2 + 1330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54578189 is a prime.

It is a Sophie Germain prime.

Together with 54578191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54578119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27289094 + 27289095.

It is an arithmetic number, because the mean of its divisors is an integer number (27289095).

Almost surely, 2^54578189 is an apocalyptic number.

It is an amenable number.

54578189 is a deficient number, since it is larger than the sum of its proper divisors (1).

54578189 is an equidigital number, since it uses as much as digits as its factorization.

54578189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The square root of 54578189 is about 7387.7052594158. The cubic root of 54578189 is about 379.3205517839.

The spelling of 54578189 in words is "fifty-four million, five hundred seventy-eight thousand, one hundred eighty-nine".