9728400043 has 2 divisors, whose sum is σ = 9728400044. Its totient is φ = 9728400042.

The previous prime is 9728400041. The next prime is 9728400061. The reversal of 9728400043 is 3400048279.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3400048279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9728400043 - 2¹ = 9728400041 is a prime.

Together with 9728400041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9728399975 and 9728400011.

It is not a weakly prime, because it can be changed into another prime (9728400041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864200021 + 4864200022.

It is an arithmetic number, because the mean of its divisors is an integer number (4864200022).

Almost surely, 2^9728400043 is an apocalyptic number.

9728400043 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728400043 is an equidigital number, since it uses as much as digits as its factorization.

9728400043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 9728400043 is about 98632.6520124041. The cubic root of 9728400043 is about 2134.7505805118.

The spelling of 9728400043 in words is "nine billion, seven hundred twenty-eight million, four hundred thousand, forty-three".