9989901 has 12 divisors (see below), whose sum is σ = 14646112. Its totient is φ = 6560136.

The previous prime is 9989899. The next prime is 9989921. The reversal of 9989901 is 1099899.

9989901 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9989901 - 2¹ = 9989899 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7681 + ... + 8886.

Almost surely, 2^9989901 is an apocalyptic number.

It is an amenable number.

9989901 is a deficient number, since it is larger than the sum of its proper divisors (4656211).

9989901 is a wasteful number, since it uses less digits than its factorization.

9989901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640 (or 16637 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The square root of 9989901 is about 3160.6804647101. The cubic root of 9989901 is about 215.3709191219.

It can be divided in two parts, 998990 and 1, that added together give a triangular number (998991 = T₁₄₁₃).

The spelling of 9989901 in words is "nine million, nine hundred eighty-nine thousand, nine hundred one".