81843086 has 16 divisors (see below), whose sum is σ = 133425600. Its totient is φ = 37425888.

The previous prime is 81843067. The next prime is 81843101. The reversal of 81843086 is 68034818.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11606 + ... + 17273.

It is an arithmetic number, because the mean of its divisors is an integer number (8339100).

Almost surely, 2^81843086 is an apocalyptic number.

81843086 is a deficient number, since it is larger than the sum of its proper divisors (51582514).

81843086 is a wasteful number, since it uses less digits than its factorization.

81843086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29003.

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

The square root of 81843086 is about 9046.7168630393. The cubic root of 81843086 is about 434.1708537527.

The spelling of 81843086 in words is "eighty-one million, eight hundred forty-three thousand, eighty-six".