9694128887 has 2 divisors, whose sum is σ = 9694128888. Its totient is φ = 9694128886.

The previous prime is 9694128883. The next prime is 9694128889. The reversal of 9694128887 is 7888214969.

9694128887 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 an emirp because it is prime and its reverse (7888214969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9694128887 - 2² = 9694128883 is a prime.

It is a super-2 number, since 2×9694128887² (a number of 21 digits) contains 22 as substring.

Together with 9694128889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9694128883) 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, 4847064443 + 4847064444.

It is an arithmetic number, because the mean of its divisors is an integer number (4847064444).

Almost surely, 2^9694128887 is an apocalyptic number.

9694128887 is a deficient number, since it is larger than the sum of its proper divisors (1).

9694128887 is an equidigital number, since it uses as much as digits as its factorization.

9694128887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 62.

The square root of 9694128887 is about 98458.7674460736. The cubic root of 9694128887 is about 2132.2408684650.

The spelling of 9694128887 in words is "nine billion, six hundred ninety-four million, one hundred twenty-eight thousand, eight hundred eighty-seven".