81963092 has 12 divisors (see below), whose sum is σ = 143513076. Its totient is φ = 40959360.

The previous prime is 81963071. The next prime is 81963097. The reversal of 81963092 is 29036918.

It can be written as a sum of positive squares in 2 ways, for example, as 63266116 + 18696976 = 7954^2 + 4324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81963097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4988 + ... + 13740.

It is an arithmetic number, because the mean of its divisors is an integer number (11959423).

Almost surely, 2^81963092 is an apocalyptic number.

It is an amenable number.

81963092 is a deficient number, since it is larger than the sum of its proper divisors (61549984).

81963092 is a wasteful number, since it uses less digits than its factorization.

81963092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11098 (or 11096 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 81963092 is about 9053.3470053898. The cubic root of 81963092 is about 434.3829574444.

The spelling of 81963092 in words is "eighty-one million, nine hundred sixty-three thousand, ninety-two".