56743209 has 12 divisors (see below), whose sum is σ = 82305652. Its totient is φ = 37670400.

The previous prime is 56743207. The next prime is 56743213. The reversal of 56743209 is 90234765.

56743209 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 28387584 + 28355625 = 5328^2 + 5325^2 .

It is not a de Polignac number, because 56743209 - 2¹ = 56743207 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56743207) 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, 10912 + ... + 15249.

Almost surely, 2^56743209 is an apocalyptic number.

It is an amenable number.

56743209 is a deficient number, since it is larger than the sum of its proper divisors (25562443).

56743209 is a wasteful number, since it uses less digits than its factorization.

56743209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26408 (or 26405 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 56743209 is about 7532.8088386737. The cubic root of 56743209 is about 384.2713129803.

The spelling of 56743209 in words is "fifty-six million, seven hundred forty-three thousand, two hundred nine".