8081643 has 8 divisors (see below), whose sum is σ = 10958400. Its totient is φ = 5296328.

The previous prime is 8081641. The next prime is 8081653. The reversal of 8081643 is 3461808.

It is a happy number.

8081643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8081643 - 2¹ = 8081641 is a prime.

8081643 is a lucky number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 8081643.

It is not an unprimeable number, because it can be changed into a prime (8081641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22653 + ... + 23006.

It is an arithmetic number, because the mean of its divisors is an integer number (1369800).

Almost surely, 2^8081643 is an apocalyptic number.

8081643 is a deficient number, since it is larger than the sum of its proper divisors (2876757).

8081643 is a wasteful number, since it uses less digits than its factorization.

8081643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45721.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 8081643 is about 2842.8230687118. The cubic root of 8081643 is about 200.6780569295.

The spelling of 8081643 in words is "eight million, eighty-one thousand, six hundred forty-three".