9728023 has 2 divisors, whose sum is σ = 9728024. Its totient is φ = 9728022.

The previous prime is 9728009. The next prime is 9728027. The reversal of 9728023 is 3208279.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9728023 is a prime.

9728023 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864011 + 4864012.

It is an arithmetic number, because the mean of its divisors is an integer number (4864012).

Almost surely, 2^9728023 is an apocalyptic number.

9728023 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728023 is an equidigital number, since it uses as much as digits as its factorization.

9728023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 9728023 is about 3118.9778774464. The cubic root of 9728023 is about 213.4723001357.

The spelling of 9728023 in words is "nine million, seven hundred twenty-eight thousand, twenty-three".