549898989 has 8 divisors (see below), whose sum is σ = 733740480. Its totient is φ = 366328416.

The previous prime is 549898967. The next prime is 549898991. The reversal of 549898989 is 989898945.

549898989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549898989 - 2⁷ = 549898861 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549893989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62944 + ... + 71145.

It is an arithmetic number, because the mean of its divisors is an integer number (91717560).

Almost surely, 2^549898989 is an apocalyptic number.

It is an amenable number.

549898989 is a deficient number, since it is larger than the sum of its proper divisors (183841491).

549898989 is a wasteful number, since it uses less digits than its factorization.

549898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135459.

The product of its digits is 67184640, while the sum is 69.

The square root of 549898989 is about 23449.9251384733. The cubic root of 549898989 is about 819.2711096747.

The spelling of 549898989 in words is "five hundred forty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".