81933834 has 32 divisors (see below), whose sum is σ = 168537600. Its totient is φ = 26539632.

The previous prime is 81933821. The next prime is 81933847. The reversal of 81933834 is 43833918.

It is an interprime number because it is at equal distance from previous prime (81933821) and next prime (81933847).

It is a junction number, because it is equal to n+sod(n) for n = 81933792 and 81933801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57867 + ... + 59265.

It is an arithmetic number, because the mean of its divisors is an integer number (5266800).

Almost surely, 2^81933834 is an apocalyptic number.

81933834 is an abundant number, since it is smaller than the sum of its proper divisors (86603766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81933834 is a wasteful number, since it uses less digits than its factorization.

81933834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674.

The product of its digits is 62208, while the sum is 39.

The square root of 81933834 is about 9051.7309946772. The cubic root of 81933834 is about 434.3312647097.

The spelling of 81933834 in words is "eighty-one million, nine hundred thirty-three thousand, eight hundred thirty-four".