81094612 has 12 divisors (see below), whose sum is σ = 142511040. Its totient is φ = 40377176.

The previous prime is 81094579. The next prime is 81094613. The reversal of 81094612 is 21649018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81094613) 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, 41458 + ... + 43369.

It is an arithmetic number, because the mean of its divisors is an integer number (11875920).

Almost surely, 2^81094612 is an apocalyptic number.

It is an amenable number.

81094612 is a deficient number, since it is larger than the sum of its proper divisors (61416428).

81094612 is a wasteful number, since it uses less digits than its factorization.

81094612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85070 (or 85068 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 81094612 is about 9005.2546882362. The cubic root of 81094612 is about 432.8432674162.

It can be divided in two parts, 8109 and 4612, that added together give a palindrome (12721).

The spelling of 81094612 in words is "eighty-one million, ninety-four thousand, six hundred twelve".