19728607 has 2 divisors, whose sum is σ = 19728608. Its totient is φ = 19728606.

The previous prime is 19728601. The next prime is 19728623. The reversal of 19728607 is 70682791.

It is a weak prime.

It is an emirp because it is prime and its reverse (70682791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19728607 - 2¹¹ = 19726559 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19728607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19728601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9864303 + 9864304.

It is an arithmetic number, because the mean of its divisors is an integer number (9864304).

Almost surely, 2^19728607 is an apocalyptic number.

19728607 is a deficient number, since it is larger than the sum of its proper divisors (1).

19728607 is an equidigital number, since it uses as much as digits as its factorization.

19728607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 19728607 is about 4441.6896559755. The cubic root of 19728607 is about 270.2083759502.

The spelling of 19728607 in words is "nineteen million, seven hundred twenty-eight thousand, six hundred seven".