545779 has 4 divisors (see below), whose sum is σ = 587776. Its totient is φ = 503784.

The previous prime is 545773. The next prime is 545789. The reversal of 545779 is 977545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545779 - 2⁵ = 545747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20979 + ... + 21004.

It is an arithmetic number, because the mean of its divisors is an integer number (146944).

2⁵⁴⁵⁷⁷⁹ is an apocalyptic number.

545779 is a deficient number, since it is larger than the sum of its proper divisors (41997).

545779 is a wasteful number, since it uses less digits than its factorization.

545779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41996.

The product of its digits is 44100, while the sum is 37.

The square root of 545779 is about 738.7685699866. The cubic root of 545779 is about 81.7219912965.

The spelling of 545779 in words is "five hundred forty-five thousand, seven hundred seventy-nine".