81059434 has 32 divisors (see below), whose sum is σ = 136468800. Its totient is φ = 35884800.

The previous prime is 81059413. The next prime is 81059441. The reversal of 81059434 is 43495018.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 81059434.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115284 + ... + 115984.

It is an arithmetic number, because the mean of its divisors is an integer number (4264650).

Almost surely, 2^81059434 is an apocalyptic number.

81059434 is a deficient number, since it is larger than the sum of its proper divisors (55409366).

81059434 is a wasteful number, since it uses less digits than its factorization.

81059434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 81059434 is about 9003.3012834182. The cubic root of 81059434 is about 432.7806707269.

The spelling of 81059434 in words is "eighty-one million, fifty-nine thousand, four hundred thirty-four".