8411991 has 16 divisors (see below), whose sum is σ = 13572864. Its totient is φ = 4523904.

The previous prime is 8411981. The next prime is 8411993. The reversal of 8411991 is 1991148.

It is not a de Polignac number, because 8411991 - 2¹⁵ = 8379223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8411993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11425 + ... + 12138.

It is an arithmetic number, because the mean of its divisors is an integer number (848304).

Almost surely, 2^8411991 is an apocalyptic number.

8411991 is a deficient number, since it is larger than the sum of its proper divisors (5160873).

8411991 is a wasteful number, since it uses less digits than its factorization.

8411991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23590.

The product of its digits is 2592, while the sum is 33.

The square root of 8411991 is about 2900.3432555475. The cubic root of 8411991 is about 203.3759524268.

Multiplying 8411991 by its sum of digits (33), we get a triangular number (277595703 = T₂₃₅₆₂).

The spelling of 8411991 in words is "eight million, four hundred eleven thousand, nine hundred ninety-one".