8181149 has 4 divisors (see below), whose sum is σ = 8355264. Its totient is φ = 8007036.

The previous prime is 8181139. The next prime is 8181167. The reversal of 8181149 is 9411818.

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 a de Polignac number, because none of the positive numbers 2^k-8181149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181119) 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, 86987 + ... + 87080.

It is an arithmetic number, because the mean of its divisors is an integer number (2088816).

Almost surely, 2^8181149 is an apocalyptic number.

It is an amenable number.

8181149 is a deficient number, since it is larger than the sum of its proper divisors (174115).

8181149 is a wasteful number, since it uses less digits than its factorization.

8181149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174114.

The product of its digits is 2304, while the sum is 32.

The square root of 8181149 is about 2860.2707913762. The cubic root of 8181149 is about 201.4983221233.

The spelling of 8181149 in words is "eight million, one hundred eighty-one thousand, one hundred forty-nine".