54745209 has 12 divisors (see below), whose sum is σ = 81005652. Its totient is φ = 35606400.

The previous prime is 54745157. The next prime is 54745211. The reversal of 54745209 is 90254745.

54745209 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 2 ways, for example, as 8573184 + 46172025 = 2928^2 + 6795^2 .

It is not a de Polignac number, because 54745209 - 2⁷ = 54745081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54745259) 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 11 ways as a sum of consecutive naturals, for example, 73812 + ... + 74549.

It is an arithmetic number, because the mean of its divisors is an integer number (6750471).

Almost surely, 2^54745209 is an apocalyptic number.

It is an amenable number.

54745209 is a deficient number, since it is larger than the sum of its proper divisors (26260443).

54745209 is a wasteful number, since it uses less digits than its factorization.

54745209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148408 (or 148405 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 54745209 is about 7399.0005406136. Note that the first 3 decimals coincide. The cubic root of 54745209 is about 379.7070896055.

The spelling of 54745209 in words is "fifty-four million, seven hundred forty-five thousand, two hundred nine".