542563849 has 3 divisors (see below), whose sum is σ = 542587143. Its totient is φ = 542540556.

The previous prime is 542563841. The next prime is 542563907. The reversal of 542563849 is 948365245.

The square root of 542563849 is 23293.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 948365245 = 5 ⋅189673049.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 525876624 = 4085^2 + 22932^2 .

It is not a de Polignac number, because 542563849 - 2³ = 542563841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542563799 and 542563808.

It is not an unprimeable number, because it can be changed into a prime (542563841) 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 in 2 ways as a sum of consecutive naturals, for example, 11647 + ... + 34939.

It is an arithmetic number, because the mean of its divisors is an integer number (180862381).

Almost surely, 2^542563849 is an apocalyptic number.

542563849 is the 23293-rd square number.

542563849 is the 11647-th centered octagonal number.

It is an amenable number.

542563849 is a deficient number, since it is larger than the sum of its proper divisors (23294).

542563849 is an frugal number, since it uses more digits than its factorization.

542563849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46586 (or 23293 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The cubic root of 542563849 is about 815.6120204997.

The spelling of 542563849 in words is "five hundred forty-two million, five hundred sixty-three thousand, eight hundred forty-nine".