8181849 has 16 divisors (see below), whose sum is σ = 11820032. Its totient is φ = 5004288.

The previous prime is 8181841. The next prime is 8181851. The reversal of 8181849 is 9481818.

It is a happy number.

It is not a de Polignac number, because 8181849 - 2³ = 8181841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8181841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6984 + ... + 8070.

It is an arithmetic number, because the mean of its divisors is an integer number (738752).

Almost surely, 2^8181849 is an apocalyptic number.

It is an amenable number.

8181849 is a deficient number, since it is larger than the sum of its proper divisors (3638183).

8181849 is a wasteful number, since it uses less digits than its factorization.

8181849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its digits is 18432, while the sum is 39.

The square root of 8181849 is about 2860.3931547953. The cubic root of 8181849 is about 201.5040688631.

The spelling of 8181849 in words is "eight million, one hundred eighty-one thousand, eight hundred forty-nine".