54449991 has 18 divisors (see below), whose sum is σ = 83012280. Its totient is φ = 34387416.

The previous prime is 54449959. The next prime is 54450001. The reversal of 54449991 is 19994445.

It is not a de Polignac number, because 54449991 - 2⁵ = 54449959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54449951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5131 + ... + 11628.

Almost surely, 2^54449991 is an apocalyptic number.

54449991 is a deficient number, since it is larger than the sum of its proper divisors (28562289).

54449991 is a wasteful number, since it uses less digits than its factorization.

54449991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16803 (or 16781 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 54449991 is about 7379.0237159126. The cubic root of 54449991 is about 379.0233252376.

The spelling of 54449991 in words is "fifty-four million, four hundred forty-nine thousand, nine hundred ninety-one".