809029543 has 12 divisors (see below), whose sum is σ = 942032160. Its totient is φ = 692778912.

The previous prime is 809029513. The next prime is 809029547. The reversal of 809029543 is 345920908.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-809029543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 809029496 and 809029505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809029547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46563 + ... + 61531.

It is an arithmetic number, because the mean of its divisors is an integer number (78502680).

Almost surely, 2^809029543 is an apocalyptic number.

809029543 is a deficient number, since it is larger than the sum of its proper divisors (133002617).

809029543 is a wasteful number, since it uses less digits than its factorization.

809029543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16086 (or 16079 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 809029543 is about 28443.4446401979. Note that the first 3 decimals coincide. The cubic root of 809029543 is about 931.7973270210.

The spelling of 809029543 in words is "eight hundred nine million, twenty-nine thousand, five hundred forty-three".