542744549 has 2 divisors, whose sum is σ = 542744550. Its totient is φ = 542744548.

The previous prime is 542744507. The next prime is 542744623. The reversal of 542744549 is 945447245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515517025 + 27227524 = 22705^2 + 5218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542744549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542744149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271372274 + 271372275.

It is an arithmetic number, because the mean of its divisors is an integer number (271372275).

Almost surely, 2^542744549 is an apocalyptic number.

It is an amenable number.

542744549 is a deficient number, since it is larger than the sum of its proper divisors (1).

542744549 is an equidigital number, since it uses as much as digits as its factorization.

542744549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 44.

The square root of 542744549 is about 23296.8785248153. The cubic root of 542744549 is about 815.7025565314.

The spelling of 542744549 in words is "five hundred forty-two million, seven hundred forty-four thousand, five hundred forty-nine".