56172089 has 2 divisors, whose sum is σ = 56172090. Its totient is φ = 56172088.

The previous prime is 56172079. The next prime is 56172107. The reversal of 56172089 is 98027165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 42025 = 7492^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 56172089 - 2⁸ = 56171833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56172019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28086044 + 28086045.

It is an arithmetic number, because the mean of its divisors is an integer number (28086045).

Almost surely, 2^56172089 is an apocalyptic number.

It is an amenable number.

56172089 is a deficient number, since it is larger than the sum of its proper divisors (1).

56172089 is an equidigital number, since it uses as much as digits as its factorization.

56172089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 56172089 is about 7494.8041335314. The cubic root of 56172089 is about 382.9777339141.

The spelling of 56172089 in words is "fifty-six million, one hundred seventy-two thousand, eighty-nine".