9790991 has 16 divisors (see below), whose sum is σ = 11527680. Its totient is φ = 8143200.

The previous prime is 9790987. The next prime is 9791003. The reversal of 9790991 is 1990979.

9790991 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9790991 - 2² = 9790987 is a prime.

It is a Duffinian number.

9790991 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9790901) 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, 62285 + ... + 62441.

It is an arithmetic number, because the mean of its divisors is an integer number (720480).

Almost surely, 2^9790991 is an apocalyptic number.

9790991 is a deficient number, since it is larger than the sum of its proper divisors (1736689).

9790991 is a wasteful number, since it uses less digits than its factorization.

9790991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 9790991 is about 3129.0559279118. The cubic root of 9790991 is about 213.9319010617.

The spelling of 9790991 in words is "nine million, seven hundred ninety thousand, nine hundred ninety-one".