81104074 has 16 divisors (see below), whose sum is σ = 126124128. Its totient is φ = 39083472.

The previous prime is 81104071. The next prime is 81104077. The reversal of 81104074 is 47040118.

It is an interprime number because it is at equal distance from previous prime (81104071) and next prime (81104077).

It is not an unprimeable number, because it can be changed into a prime (81104071) 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, 2797 + ... + 13039.

It is an arithmetic number, because the mean of its divisors is an integer number (7882758).

Almost surely, 2^81104074 is an apocalyptic number.

81104074 is a deficient number, since it is larger than the sum of its proper divisors (45020054).

81104074 is a wasteful number, since it uses less digits than its factorization.

81104074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10389.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 81104074 is about 9005.7800328456. The cubic root of 81104074 is about 432.8601012667.

The spelling of 81104074 in words is "eighty-one million, one hundred four thousand, seventy-four".