81412984 has 16 divisors (see below), whose sum is σ = 152764920. Its totient is φ = 40675680.

The previous prime is 81412937. The next prime is 81412993. The reversal of 81412984 is 48921418.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10539 + ... + 16549.

Almost surely, 2^81412984 is an apocalyptic number.

It is an amenable number.

81412984 is a deficient number, since it is larger than the sum of its proper divisors (71351936).

81412984 is a wasteful number, since it uses less digits than its factorization.

81412984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710 (or 7706 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 81412984 is about 9022.9143850532. The cubic root of 81412984 is about 433.4089656284.

The spelling of 81412984 in words is "eighty-one million, four hundred twelve thousand, nine hundred eighty-four".