81934276 has 6 divisors (see below), whose sum is σ = 143384990. Its totient is φ = 40967136.

The previous prime is 81934273. The next prime is 81934283. The reversal of 81934276 is 67243918.

It can be written as a sum of positive squares in only one way, i.e., 72692676 + 9241600 = 8526^2 + 3040^2 .

It is not an unprimeable number, because it can be changed into a prime (81934273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10241781 + ... + 10241788.

Almost surely, 2^81934276 is an apocalyptic number.

It is an amenable number.

81934276 is a deficient number, since it is larger than the sum of its proper divisors (61450714).

81934276 is a wasteful number, since it uses less digits than its factorization.

81934276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20483573 (or 20483571 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 81934276 is about 9051.7554098639. The cubic root of 81934276 is about 434.3320457223.

The spelling of 81934276 in words is "eighty-one million, nine hundred thirty-four thousand, two hundred seventy-six".