56873009 has 4 divisors (see below), whose sum is σ = 56896500. Its totient is φ = 56849520.

The previous prime is 56872993. The next prime is 56873057. The reversal of 56873009 is 90037865.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7480225 + 49392784 = 2735^2 + 7028^2 .

It is a cyclic number.

It is not a de Polignac number, because 56873009 - 2⁴ = 56872993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56873909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7634 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (14224125).

Almost surely, 2^56873009 is an apocalyptic number.

It is an amenable number.

56873009 is a deficient number, since it is larger than the sum of its proper divisors (23491).

56873009 is a wasteful number, since it uses less digits than its factorization.

56873009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23490.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 56873009 is about 7541.4195613293. The cubic root of 56873009 is about 384.5640965180.

The spelling of 56873009 in words is "fifty-six million, eight hundred seventy-three thousand, nine".