81034805 has 8 divisors (see below), whose sum is σ = 97347744. Its totient is φ = 64757200.

The previous prime is 81034781. The next prime is 81034813. The reversal of 81034805 is 50843018.

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

It is not a de Polignac number, because 81034805 - 2⁸ = 81034549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3491 + ... + 13200.

It is an arithmetic number, because the mean of its divisors is an integer number (12168468).

Almost surely, 2^81034805 is an apocalyptic number.

It is an amenable number.

81034805 is a deficient number, since it is larger than the sum of its proper divisors (16312939).

81034805 is a wasteful number, since it uses less digits than its factorization.

81034805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17667.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 81034805 is about 9001.9334034417. The cubic root of 81034805 is about 432.7368344357.

The spelling of 81034805 in words is "eighty-one million, thirty-four thousand, eight hundred five".