56138723 has 2 divisors, whose sum is σ = 56138724. Its totient is φ = 56138722.

The previous prime is 56138683. The next prime is 56138807. The reversal of 56138723 is 32783165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56138723 - 2¹⁰ = 56137699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (56138023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28069361 + 28069362.

It is an arithmetic number, because the mean of its divisors is an integer number (28069362).

Almost surely, 2^56138723 is an apocalyptic number.

56138723 is a deficient number, since it is larger than the sum of its proper divisors (1).

56138723 is an equidigital number, since it uses as much as digits as its factorization.

56138723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 56138723 is about 7492.5778607900. The cubic root of 56138723 is about 382.9018898057.

The spelling of 56138723 in words is "fifty-six million, one hundred thirty-eight thousand, seven hundred twenty-three".