9842991 has 8 divisors (see below), whose sum is σ = 13173504. Its totient is φ = 6537240.

The previous prime is 9842981. The next prime is 9843013. The reversal of 9842991 is 1992489.

9842991 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 a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9842991 - 2⁷ = 9842863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9842981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5241 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (1646688).

Almost surely, 2^9842991 is an apocalyptic number.

9842991 is a deficient number, since it is larger than the sum of its proper divisors (3330513).

9842991 is a wasteful number, since it uses less digits than its factorization.

9842991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12381.

The product of its digits is 46656, while the sum is 42.

The square root of 9842991 is about 3137.3541400358. The cubic root of 9842991 is about 214.3099636684.

The spelling of 9842991 in words is "nine million, eight hundred forty-two thousand, nine hundred ninety-one".