9010991 has 6 divisors (see below), whose sum is σ = 9904776. Its totient is φ = 8191700.

The previous prime is 9010979. The next prime is 9010993. The reversal of 9010991 is 1990109.

It is not a de Polignac number, because 9010991 - 2⁶ = 9010927 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 (9010993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37115 + ... + 37356.

It is an arithmetic number, because the mean of its divisors is an integer number (1650796).

Almost surely, 2^9010991 is an apocalyptic number.

9010991 is a deficient number, since it is larger than the sum of its proper divisors (893785).

9010991 is a wasteful number, since it uses less digits than its factorization.

9010991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74493 (or 74482 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9010991 is about 3001.8312744057. The cubic root of 9010991 is about 208.0930226793.

It can be divided in two parts, 9010 and 991, that added together give a palindrome (10001).

The spelling of 9010991 in words is "nine million, ten thousand, nine hundred ninety-one".