545730257 has 2 divisors, whose sum is σ = 545730258. Its totient is φ = 545730256.

The previous prime is 545730239. The next prime is 545730271. The reversal of 545730257 is 752037545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427703761 + 118026496 = 20681^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 545730257 - 2⁸ = 545730001 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545730257.

It is not a weakly prime, because it can be changed into another prime (545700257) 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, 272865128 + 272865129.

It is an arithmetic number, because the mean of its divisors is an integer number (272865129).

Almost surely, 2^545730257 is an apocalyptic number.

It is an amenable number.

545730257 is a deficient number, since it is larger than the sum of its proper divisors (1).

545730257 is an equidigital number, since it uses as much as digits as its factorization.

545730257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147000, while the sum is 38.

The square root of 545730257 is about 23360.8702106749. The cubic root of 545730257 is about 817.1955838645.

The spelling of 545730257 in words is "five hundred forty-five million, seven hundred thirty thousand, two hundred fifty-seven".