54999009 has 12 divisors (see below), whose sum is σ = 85554196. Its totient is φ = 33845472.

The previous prime is 54998989. The next prime is 54999011. The reversal of 54999009 is 90099945.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17139600 + 37859409 = 4140^2 + 6153^2 .

It is not a de Polignac number, because 54999009 - 2¹¹ = 54996961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54999079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234922 + ... + 235155.

Almost surely, 2^54999009 is an apocalyptic number.

It is an amenable number.

54999009 is a deficient number, since it is larger than the sum of its proper divisors (30555187).

54999009 is a wasteful number, since it uses less digits than its factorization.

54999009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470096 (or 470093 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 54999009 is about 7416.1316735883. The cubic root of 54999009 is about 380.2929619861.

The spelling of 54999009 in words is "fifty-four million, nine hundred ninety-nine thousand, nine".