8109641 has 4 divisors (see below), whose sum is σ = 8116752. Its totient is φ = 8102532.

The previous prime is 8109617. The next prime is 8109649. The reversal of 8109641 is 1469018.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8109641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8109649) 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, 1415 + ... + 4268.

It is an arithmetic number, because the mean of its divisors is an integer number (2029188).

Almost surely, 2^8109641 is an apocalyptic number.

It is an amenable number.

8109641 is a deficient number, since it is larger than the sum of its proper divisors (7111).

8109641 is a wasteful number, since it uses less digits than its factorization.

8109641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 8109641 is about 2847.7431415070. The cubic root of 8109641 is about 200.9095324832.

The spelling of 8109641 in words is "eight million, one hundred nine thousand, six hundred forty-one".