9895989799 has 4 divisors (see below), whose sum is σ = 10478106864. Its totient is φ = 9313872736.

The previous prime is 9895989793. The next prime is 9895989809. The reversal of 9895989799 is 9979895989.

9895989799 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9979895989 = 7 ⋅1425699427.

It is a cyclic number.

It is not a de Polignac number, because 9895989799 - 2⁷ = 9895989671 is a prime.

It is a super-2 number, since 2×9895989799² (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 (9895989793) 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 in 3 ways as a sum of consecutive naturals, for example, 291058507 + ... + 291058540.

It is an arithmetic number, because the mean of its divisors is an integer number (2619526716).

Almost surely, 2^9895989799 is an apocalyptic number.

9895989799 is a deficient number, since it is larger than the sum of its proper divisors (582117065).

9895989799 is a wasteful number, since it uses less digits than its factorization.

9895989799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582117064.

The product of its digits is 1190427840, while the sum is 82.

The square root of 9895989799 is about 99478.5896512410. The cubic root of 9895989799 is about 2146.9392032450.

The spelling of 9895989799 in words is "nine billion, eight hundred ninety-five million, nine hundred eighty-nine thousand, seven hundred ninety-nine".