9895985091 has 6 divisors (see below), whose sum is σ = 14294200700. Its totient is φ = 6597323388.

The previous prime is 9895985089. The next prime is 9895985093. The reversal of 9895985091 is 1905895989.

It is an interprime number because it is at equal distance from previous prime (9895985089) and next prime (9895985093).

It is not a de Polignac number, because 9895985091 - 2¹ = 9895985089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9895985093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549776941 + ... + 549776958.

Almost surely, 2^9895985091 is an apocalyptic number.

9895985091 is a deficient number, since it is larger than the sum of its proper divisors (4398215609).

9895985091 is a wasteful number, since it uses less digits than its factorization.

9895985091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099553905 (or 1099553902 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 63.

The square root of 9895985091 is about 99478.5659878549. The cubic root of 9895985091 is about 2146.9388627774.

The spelling of 9895985091 in words is "nine billion, eight hundred ninety-five million, nine hundred eighty-five thousand, ninety-one".