54408709 has 6 divisors (see below), whose sum is σ = 54907346. Its totient is φ = 53914560.

The previous prime is 54408707. The next prime is 54408713. The reversal of 54408709 is 90780445.

54408709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 91809 + 54316900 = 303^2 + 7370^2 .

It is not a de Polignac number, because 54408709 - 2¹ = 54408707 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 (54408701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10639 + ... + 14899.

Almost surely, 2^54408709 is an apocalyptic number.

It is an amenable number.

54408709 is a deficient number, since it is larger than the sum of its proper divisors (498637).

54408709 is an equidigital number, since it uses as much as digits as its factorization.

54408709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4487 (or 4374 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 54408709 is about 7376.2259320062. The cubic root of 54408709 is about 378.9275137932.

The spelling of 54408709 in words is "fifty-four million, four hundred eight thousand, seven hundred nine".