545789 has 2 divisors, whose sum is σ = 545790. Its totient is φ = 545788.

The previous prime is 545773. The next prime is 545791. The reversal of 545789 is 987545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 20164 = 725^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 545789 - 2⁴ = 545773 is a prime.

Together with 545791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272894 + 272895.

It is an arithmetic number, because the mean of its divisors is an integer number (272895).

2⁵⁴⁵⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

545789 is a deficient number, since it is larger than the sum of its proper divisors (1).

545789 is an equidigital number, since it uses as much as digits as its factorization.

545789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 38.

The square root of 545789 is about 738.7753379749. The cubic root of 545789 is about 81.7224904087.

The spelling of 545789 in words is "five hundred forty-five thousand, seven hundred eighty-nine".