545242549 has 2 divisors, whose sum is σ = 545242550. Its totient is φ = 545242548.

The previous prime is 545242499. The next prime is 545242561. The reversal of 545242549 is 945242545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437228100 + 108014449 = 20910^2 + 10393^2 .

It is a cyclic number.

It is not a de Polignac number, because 545242549 - 2⁷ = 545242421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545242589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272621274 + 272621275.

It is an arithmetic number, because the mean of its divisors is an integer number (272621275).

Almost surely, 2^545242549 is an apocalyptic number.

It is an amenable number.

545242549 is a deficient number, since it is larger than the sum of its proper divisors (1).

545242549 is an equidigital number, since it uses as much as digits as its factorization.

545242549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 40.

The square root of 545242549 is about 23350.4293108285. The cubic root of 545242549 is about 816.9520743016.

The spelling of 545242549 in words is "five hundred forty-five million, two hundred forty-two thousand, five hundred forty-nine".