56869209 has 20 divisors (see below), whose sum is σ = 85580880. Its totient is φ = 37632600.

The previous prime is 56869207. The next prime is 56869213. The reversal of 56869209 is 90296865.

56869209 is a `hidden beast` number, since 568 + 69 + 20 + 9 = 666.

56869209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56869209 - 2¹ = 56869207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56869207) 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 19 ways as a sum of consecutive naturals, for example, 8734 + ... + 13784.

It is an arithmetic number, because the mean of its divisors is an integer number (4279044).

Almost surely, 2^56869209 is an apocalyptic number.

It is an amenable number.

56869209 is a deficient number, since it is larger than the sum of its proper divisors (28711671).

56869209 is a wasteful number, since it uses less digits than its factorization.

56869209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202 (or 5193 counting only the distinct ones).

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

The square root of 56869209 is about 7541.1676151641. The cubic root of 56869209 is about 384.5555313765. Note that the first 4 decimals are identical.

The spelling of 56869209 in words is "fifty-six million, eight hundred sixty-nine thousand, two hundred nine".