8091749 has 4 divisors (see below), whose sum is σ = 8106540. Its totient is φ = 8076960.

The previous prime is 8091731. The next prime is 8091751. The reversal of 8091749 is 9471908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3330625 + 4761124 = 1825^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 8091749 - 2²⁰ = 7043173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8090749) 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, 6542 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (2026635).

Almost surely, 2^8091749 is an apocalyptic number.

It is an amenable number.

8091749 is a deficient number, since it is larger than the sum of its proper divisors (14791).

8091749 is a wasteful number, since it uses less digits than its factorization.

8091749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14790.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 8091749 is about 2844.5999718765. The cubic root of 8091749 is about 200.7616706071.

The spelling of 8091749 in words is "eight million, ninety-one thousand, seven hundred forty-nine".