81096930 has 64 divisors (see below), whose sum is σ = 223257600. Its totient is φ = 20926080.

The previous prime is 81096923. The next prime is 81096971. The reversal of 81096930 is 3969018.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3526 + ... + 13214.

It is an arithmetic number, because the mean of its divisors is an integer number (3488400).

Almost surely, 2^81096930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81096930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111628800).

81096930 is an abundant number, since it is smaller than the sum of its proper divisors (142160670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81096930 is a wasteful number, since it uses less digits than its factorization.

81096930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736 (or 9730 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 81096930 is about 9005.3833899507. The cubic root of 81096930 is about 432.8473914926.

The spelling of 81096930 in words is "eighty-one million, ninety-six thousand, nine hundred thirty".