81043683 has 16 divisors (see below), whose sum is σ = 129995520. Its totient is φ = 43873056.

The previous prime is 81043679. The next prime is 81043687. The reversal of 81043683 is 38634018.

It is an interprime number because it is at equal distance from previous prime (81043679) and next prime (81043687).

It is not a de Polignac number, because 81043683 - 2² = 81043679 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81043687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101160 + ... + 101957.

It is an arithmetic number, because the mean of its divisors is an integer number (8124720).

Almost surely, 2^81043683 is an apocalyptic number.

81043683 is a deficient number, since it is larger than the sum of its proper divisors (48951837).

81043683 is a wasteful number, since it uses less digits than its factorization.

81043683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203146.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 81043683 is about 9002.4265062260. The cubic root of 81043683 is about 432.7526370994.

The spelling of 81043683 in words is "eighty-one million, forty-three thousand, six hundred eighty-three".