9728863231 has 2 divisors, whose sum is σ = 9728863232. Its totient is φ = 9728863230.

The previous prime is 9728863187. The next prime is 9728863273. The reversal of 9728863231 is 1323688279.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9728863231 - 2⁷ = 9728863103 is a prime.

It is a super-2 number, since 2×9728863231² (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 (9728863031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864431615 + 4864431616.

It is an arithmetic number, because the mean of its divisors is an integer number (4864431616).

Almost surely, 2^9728863231 is an apocalyptic number.

9728863231 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728863231 is an equidigital number, since it uses as much as digits as its factorization.

9728863231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 9728863231 is about 98635.0000304152. Note that the first 4 decimals coincide. The cubic root of 9728863231 is about 2134.7844598463.

The spelling of 9728863231 in words is "nine billion, seven hundred twenty-eight million, eight hundred sixty-three thousand, two hundred thirty-one".