9728994047 has 2 divisors, whose sum is σ = 9728994048. Its totient is φ = 9728994046.

The previous prime is 9728994019. The next prime is 9728994071. The reversal of 9728994047 is 7404998279.

9728994047 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9728994047 - 2¹⁰ = 9728993023 is a prime.

It is a super-2 number, since 2×9728994047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728994347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864497023 + 4864497024.

It is an arithmetic number, because the mean of its divisors is an integer number (4864497024).

Almost surely, 2^9728994047 is an apocalyptic number.

9728994047 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728994047 is an equidigital number, since it uses as much as digits as its factorization.

9728994047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The square root of 9728994047 is about 98635.6631599342. The cubic root of 9728994047 is about 2134.7940280321.

The spelling of 9728994047 in words is "nine billion, seven hundred twenty-eight million, nine hundred ninety-four thousand, forty-seven".