81086834 has 8 divisors (see below), whose sum is σ = 121693440. Its totient is φ = 40522356.

The previous prime is 81086791. The next prime is 81086861. The reversal of 81086834 is 43868018.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 5174 + ... + 13745.

It is an arithmetic number, because the mean of its divisors is an integer number (15211680).

Almost surely, 2^81086834 is an apocalyptic number.

81086834 is a deficient number, since it is larger than the sum of its proper divisors (40606606).

81086834 is a wasteful number, since it uses less digits than its factorization.

81086834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21064.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 81086834 is about 9004.8228189121. The cubic root of 81086834 is about 432.8294285906.

The spelling of 81086834 in words is "eighty-one million, eighty-six thousand, eight hundred thirty-four".