545504189 has 2 divisors, whose sum is σ = 545504190. Its totient is φ = 545504188.

The previous prime is 545504081. The next prime is 545504191. The reversal of 545504189 is 981405545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536292964 + 9211225 = 23158^2 + 3035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545504189 is a prime.

It is a Sophie Germain prime.

Together with 545504191, 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 (545504389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272752094 + 272752095.

It is an arithmetic number, because the mean of its divisors is an integer number (272752095).

Almost surely, 2^545504189 is an apocalyptic number.

It is an amenable number.

545504189 is a deficient number, since it is larger than the sum of its proper divisors (1).

545504189 is an equidigital number, since it uses as much as digits as its factorization.

545504189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 545504189 is about 23356.0311054768. The cubic root of 545504189 is about 817.0827275681.

The spelling of 545504189 in words is "five hundred forty-five million, five hundred four thousand, one hundred eighty-nine".