9728408047 has 2 divisors, whose sum is σ = 9728408048. Its totient is φ = 9728408046.

The previous prime is 9728407961. The next prime is 9728408059. The reversal of 9728408047 is 7408048279.

It is a strong prime.

It is an emirp because it is prime and its reverse (7408048279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9728408047 - 2⁷ = 9728407919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728408077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864204023 + 4864204024.

It is an arithmetic number, because the mean of its divisors is an integer number (4864204024).

Almost surely, 2^9728408047 is an apocalyptic number.

9728408047 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728408047 is an equidigital number, since it uses as much as digits as its factorization.

9728408047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 9728408047 is about 98632.6925871944. The cubic root of 9728408047 is about 2134.7511659640.

The spelling of 9728408047 in words is "nine billion, seven hundred twenty-eight million, four hundred eight thousand, forty-seven".