56623789 has 2 divisors, whose sum is σ = 56623790. Its totient is φ = 56623788.

The previous prime is 56623771. The next prime is 56623823. The reversal of 56623789 is 98732665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34222500 + 22401289 = 5850^2 + 4733^2 .

It is a cyclic number.

It is not a de Polignac number, because 56623789 - 2⁵ = 56623757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56623729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28311894 + 28311895.

It is an arithmetic number, because the mean of its divisors is an integer number (28311895).

Almost surely, 2^56623789 is an apocalyptic number.

It is an amenable number.

56623789 is a deficient number, since it is larger than the sum of its proper divisors (1).

56623789 is an equidigital number, since it uses as much as digits as its factorization.

56623789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 56623789 is about 7524.8780056556. The cubic root of 56623789 is about 384.0015484783.

The spelling of 56623789 in words is "fifty-six million, six hundred twenty-three thousand, seven hundred eighty-nine".