9935696891 has 4 divisors (see below), whose sum is σ = 9958749984. Its totient is φ = 9912643800.

The previous prime is 9935696851. The next prime is 9935696909. The reversal of 9935696891 is 1986965399.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9935696891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9935696851) 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, 11525900 + ... + 11526761.

It is an arithmetic number, because the mean of its divisors is an integer number (2489687496).

Almost surely, 2^9935696891 is an apocalyptic number.

9935696891 is a deficient number, since it is larger than the sum of its proper divisors (23053093).

9935696891 is a wasteful number, since it uses less digits than its factorization.

9935696891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23053092.

The product of its digits is 28343520, while the sum is 65.

The square root of 9935696891 is about 99677.9659252736. The cubic root of 9935696891 is about 2149.8068613958.

The spelling of 9935696891 in words is "nine billion, nine hundred thirty-five million, six hundred ninety-six thousand, eight hundred ninety-one".