545673917 has 2 divisors, whose sum is σ = 545673918. Its totient is φ = 545673916.

The previous prime is 545673907. The next prime is 545673923. The reversal of 545673917 is 719376545.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478121956 + 67551961 = 21866^2 + 8219^2 .

It is a cyclic number.

It is not a de Polignac number, because 545673917 - 2¹⁰ = 545672893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545673907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272836958 + 272836959.

It is an arithmetic number, because the mean of its divisors is an integer number (272836959).

Almost surely, 2^545673917 is an apocalyptic number.

It is an amenable number.

545673917 is a deficient number, since it is larger than the sum of its proper divisors (1).

545673917 is an equidigital number, since it uses as much as digits as its factorization.

545673917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 47.

The square root of 545673917 is about 23359.6643169374. The cubic root of 545673917 is about 817.1674610675.

The spelling of 545673917 in words is "five hundred forty-five million, six hundred seventy-three thousand, nine hundred seventeen".