9828991 has 8 divisors (see below), whose sum is σ = 10044000. Its totient is φ = 9615840.

The previous prime is 9828979. The next prime is 9828997. The reversal of 9828991 is 1998289.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9828991 - 2²¹ = 7731839 is a prime.

It is a Duffinian number.

9828991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9828997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16110 + ... + 16708.

It is an arithmetic number, because the mean of its divisors is an integer number (1255500).

Almost surely, 2^9828991 is an apocalyptic number.

9828991 is a deficient number, since it is larger than the sum of its proper divisors (215009).

9828991 is a wasteful number, since it uses less digits than its factorization.

9828991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its digits is 93312, while the sum is 46.

The square root of 9828991 is about 3135.1221666787. The cubic root of 9828991 is about 214.2083088256.

The spelling of 9828991 in words is "nine million, eight hundred twenty-eight thousand, nine hundred ninety-one".