9891039 has 12 divisors (see below), whose sum is σ = 13920216. Its totient is φ = 6246288.

The previous prime is 9891029. The next prime is 9891041. The reversal of 9891039 is 9301989.

It is not a de Polignac number, because 9891039 - 2⁴ = 9891023 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9890988 and 9891006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9891029) 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, 3484 + ... + 5649.

It is an arithmetic number, because the mean of its divisors is an integer number (1160018).

Almost surely, 2^9891039 is an apocalyptic number.

9891039 is a deficient number, since it is larger than the sum of its proper divisors (4029177).

9891039 is a wasteful number, since it uses less digits than its factorization.

9891039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 9891039 is about 3145.0022257544. The cubic root of 9891039 is about 214.6581117539.

The spelling of 9891039 in words is "nine million, eight hundred ninety-one thousand, thirty-nine".