549847621 has 4 divisors (see below), whose sum is σ = 549907744. Its totient is φ = 549787500.

The previous prime is 549847619. The next prime is 549847657. The reversal of 549847621 is 126748945.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 549847621 - 2¹ = 549847619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549847691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13185 + ... + 35686.

It is an arithmetic number, because the mean of its divisors is an integer number (137476936).

Almost surely, 2^549847621 is an apocalyptic number.

It is an amenable number.

549847621 is a deficient number, since it is larger than the sum of its proper divisors (60123).

549847621 is a wasteful number, since it uses less digits than its factorization.

549847621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60122.

The product of its digits is 483840, while the sum is 46.

The square root of 549847621 is about 23448.8298428728. The cubic root of 549847621 is about 819.2455985477.

The spelling of 549847621 in words is "five hundred forty-nine million, eight hundred forty-seven thousand, six hundred twenty-one".