9041991 has 8 divisors (see below), whose sum is σ = 13778304. Its totient is φ = 5166840.

The previous prime is 9041971. The next prime is 9041993. The reversal of 9041991 is 1991409.

9041991 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 9041991 - 2⁹ = 9041479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9041993) 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, 215265 + ... + 215306.

It is an arithmetic number, because the mean of its divisors is an integer number (1722288).

Almost surely, 2^9041991 is an apocalyptic number.

9041991 is a deficient number, since it is larger than the sum of its proper divisors (4736313).

9041991 is a wasteful number, since it uses less digits than its factorization.

9041991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430581.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 9041991 is about 3006.9903558209. The cubic root of 9041991 is about 208.3313797506.

The spelling of 9041991 in words is "nine million, forty-one thousand, nine hundred ninety-one".