545981873 has 2 divisors, whose sum is σ = 545981874. Its totient is φ = 545981872.

The previous prime is 545981867. The next prime is 545981881. The reversal of 545981873 is 378189545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447237904 + 98743969 = 21148^2 + 9937^2 .

It is a cyclic number.

It is not a de Polignac number, because 545981873 - 2¹² = 545977777 is a prime.

It is not a weakly prime, because it can be changed into another prime (545981833) 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 as a sum of consecutive naturals, namely, 272990936 + 272990937.

It is an arithmetic number, because the mean of its divisors is an integer number (272990937).

Almost surely, 2^545981873 is an apocalyptic number.

It is an amenable number.

545981873 is a deficient number, since it is larger than the sum of its proper divisors (1).

545981873 is an equidigital number, since it uses as much as digits as its factorization.

545981873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 545981873 is about 23366.2550058840. The cubic root of 545981873 is about 817.3211574351.

The spelling of 545981873 in words is "five hundred forty-five million, nine hundred eighty-one thousand, eight hundred seventy-three".