9726428783 has 4 divisors (see below), whose sum is σ = 9812503488. Its totient is φ = 9640354080.

The previous prime is 9726428779. The next prime is 9726428819. The reversal of 9726428783 is 3878246279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9726428783 - 2² = 9726428779 is a prime.

It is a super-2 number, since 2×9726428783² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9726428753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43037183 + ... + 43037408.

It is an arithmetic number, because the mean of its divisors is an integer number (2453125872).

Almost surely, 2^9726428783 is an apocalyptic number.

9726428783 is a deficient number, since it is larger than the sum of its proper divisors (86074705).

9726428783 is a wasteful number, since it uses less digits than its factorization.

9726428783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86074704.

The product of its digits is 8128512, while the sum is 56.

The square root of 9726428783 is about 98622.6585678971. The cubic root of 9726428783 is about 2134.6063830187.

The spelling of 9726428783 in words is "nine billion, seven hundred twenty-six million, four hundred twenty-eight thousand, seven hundred eighty-three".