549489621 has 16 divisors (see below), whose sum is σ = 737142848. Its totient is φ = 364089600.

The previous prime is 549489613. The next prime is 549489659. The reversal of 549489621 is 126984945.

It is not a de Polignac number, because 549489621 - 2³ = 549489613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549489221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424986 + ... + 426276.

It is an arithmetic number, because the mean of its divisors is an integer number (46071428).

Almost surely, 2^549489621 is an apocalyptic number.

It is an amenable number.

549489621 is a deficient number, since it is larger than the sum of its proper divisors (187653227).

549489621 is a wasteful number, since it uses less digits than its factorization.

549489621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its digits is 622080, while the sum is 48.

The square root of 549489621 is about 23441.1949567423. The cubic root of 549489621 is about 819.0677592162.

The spelling of 549489621 in words is "five hundred forty-nine million, four hundred eighty-nine thousand, six hundred twenty-one".