9726428819 has 2 divisors, whose sum is σ = 9726428820. Its totient is φ = 9726428818.

The previous prime is 9726428779. The next prime is 9726428851. The reversal of 9726428819 is 9188246279.

9726428819 is digitally balanced in base 2, 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 9726428819 - 2¹² = 9726424723 is a prime.

It is a super-2 number, since 2×9726428819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9726428869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4863214409 + 4863214410.

It is an arithmetic number, because the mean of its divisors is an integer number (4863214410).

Almost surely, 2^9726428819 is an apocalyptic number.

9726428819 is a deficient number, since it is larger than the sum of its proper divisors (1).

9726428819 is an equidigital number, since it uses as much as digits as its factorization.

9726428819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 9726428819 is about 98622.6587504109. The cubic root of 9726428819 is about 2134.6063856523.

The spelling of 9726428819 in words is "nine billion, seven hundred twenty-six million, four hundred twenty-eight thousand, eight hundred nineteen".