545783321 has 2 divisors, whose sum is σ = 545783322. Its totient is φ = 545783320.

The previous prime is 545783291. The next prime is 545783323. The reversal of 545783321 is 123387545.

545783321 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., 513520921 + 32262400 = 22661^2 + 5680^2 .

It is a cyclic number.

It is not a de Polignac number, because 545783321 - 2¹⁴ = 545766937 is a prime.

Together with 545783323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (545783323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272891660 + 272891661.

It is an arithmetic number, because the mean of its divisors is an integer number (272891661).

Almost surely, 2^545783321 is an apocalyptic number.

It is an amenable number.

545783321 is a deficient number, since it is larger than the sum of its proper divisors (1).

545783321 is an equidigital number, since it uses as much as digits as its factorization.

545783321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 545783321 is about 23362.0059284300. The cubic root of 545783321 is about 817.2220696362. Note that the first 3 decimals are identical.

The spelling of 545783321 in words is "five hundred forty-five million, seven hundred eighty-three thousand, three hundred twenty-one".