8491641 has 4 divisors (see below), whose sum is σ = 11322192. Its totient is φ = 5661092.

The previous prime is 8491621. The next prime is 8491643. The reversal of 8491641 is 1461948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8491641 - 2¹⁰ = 8490617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8491643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415271 + ... + 1415276.

It is an arithmetic number, because the mean of its divisors is an integer number (2830548).

Almost surely, 2^8491641 is an apocalyptic number.

It is an amenable number.

8491641 is a deficient number, since it is larger than the sum of its proper divisors (2830551).

8491641 is a wasteful number, since it uses less digits than its factorization.

8491641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830550.

The product of its digits is 6912, while the sum is 33.

The square root of 8491641 is about 2914.0420381319. The cubic root of 8491641 is about 204.0158340266.

The spelling of 8491641 in words is "eight million, four hundred ninety-one thousand, six hundred forty-one".