56873813 has 2 divisors, whose sum is σ = 56873814. Its totient is φ = 56873812.

The previous prime is 56873801. The next prime is 56873837. The reversal of 56873813 is 31837865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40170244 + 16703569 = 6338^2 + 4087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56873813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56873513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28436906 + 28436907.

It is an arithmetic number, because the mean of its divisors is an integer number (28436907).

Almost surely, 2^56873813 is an apocalyptic number.

It is an amenable number.

56873813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56873813 is an equidigital number, since it uses as much as digits as its factorization.

56873813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 56873813 is about 7541.4728667549. The cubic root of 56873813 is about 384.5659086727.

The spelling of 56873813 in words is "fifty-six million, eight hundred seventy-three thousand, eight hundred thirteen".