9982391 has 16 divisors (see below), whose sum is σ = 11197440. Its totient is φ = 8854560.

The previous prime is 9982381. The next prime is 9982433. The reversal of 9982391 is 1932899.

9982391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9982391 - 2¹⁴ = 9966007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9982381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22946 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^9982391 is an apocalyptic number.

9982391 is a deficient number, since it is larger than the sum of its proper divisors (1215049).

9982391 is a wasteful number, since it uses less digits than its factorization.

9982391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its digits is 34992, while the sum is 41.

The square root of 9982391 is about 3159.4922060356. The cubic root of 9982391 is about 215.3169365689.

The spelling of 9982391 in words is "nine million, nine hundred eighty-two thousand, three hundred ninety-one".