8181914 has 16 divisors (see below), whose sum is σ = 13319208. Its totient is φ = 3747072.

The previous prime is 8181893. The next prime is 8181917. The reversal of 8181914 is 4191818.

It can be written as a sum of positive squares in 4 ways, for example, as 5880625 + 2301289 = 2425^2 + 1517^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181917) 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 7 ways as a sum of consecutive naturals, for example, 2414 + ... + 4710.

Almost surely, 2^8181914 is an apocalyptic number.

8181914 is a deficient number, since it is larger than the sum of its proper divisors (5137294).

8181914 is a wasteful number, since it uses less digits than its factorization.

8181914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

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

The square root of 8181914 is about 2860.4045168472. The cubic root of 8181914 is about 201.5046024723.

The spelling of 8181914 in words is "eight million, one hundred eighty-one thousand, nine hundred fourteen".