549000643 has 4 divisors (see below), whose sum is σ = 552288240. Its totient is φ = 545713048.

The previous prime is 549000637. The next prime is 549000677. The reversal of 549000643 is 346000945.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 549000643 - 2²⁹ = 12129731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549000623) 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 3 ways as a sum of consecutive naturals, for example, 1643548 + ... + 1643881.

It is an arithmetic number, because the mean of its divisors is an integer number (138072060).

Almost surely, 2^549000643 is an apocalyptic number.

549000643 is a deficient number, since it is larger than the sum of its proper divisors (3287597).

549000643 is a wasteful number, since it uses less digits than its factorization.

549000643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287596.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 549000643 is about 23430.7627490016. The cubic root of 549000643 is about 818.8247306805.

The spelling of 549000643 in words is "five hundred forty-nine million, six hundred forty-three", and thus it is an aban number.