545969549 has 2 divisors, whose sum is σ = 545969550. Its totient is φ = 545969548.

The previous prime is 545969537. The next prime is 545969563. The reversal of 545969549 is 945969545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395293924 + 150675625 = 19882^2 + 12275^2 .

It is a cyclic number.

It is not a de Polignac number, because 545969549 - 2⁸ = 545969293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 545969494 and 545969503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545965549) 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, 272984774 + 272984775.

It is an arithmetic number, because the mean of its divisors is an integer number (272984775).

Almost surely, 2^545969549 is an apocalyptic number.

It is an amenable number.

545969549 is a deficient number, since it is larger than the sum of its proper divisors (1).

545969549 is an equidigital number, since it uses as much as digits as its factorization.

545969549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748000, while the sum is 56.

The square root of 545969549 is about 23365.9912907627. The cubic root of 545969549 is about 817.3150078160.

The spelling of 545969549 in words is "five hundred forty-five million, nine hundred sixty-nine thousand, five hundred forty-nine".