81414986 has 8 divisors (see below), whose sum is σ = 127432224. Its totient is φ = 38937580.

The previous prime is 81414979. The next prime is 81414997. The reversal of 81414986 is 68941418.

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

It is a Curzon 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, 884900 + ... + 884991.

It is an arithmetic number, because the mean of its divisors is an integer number (15929028).

Almost surely, 2^81414986 is an apocalyptic number.

81414986 is a deficient number, since it is larger than the sum of its proper divisors (46017238).

81414986 is a wasteful number, since it uses less digits than its factorization.

81414986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769916.

The product of its digits is 55296, while the sum is 41.

The square root of 81414986 is about 9023.0253241360. The cubic root of 81414986 is about 433.4125182052.

The spelling of 81414986 in words is "eighty-one million, four hundred fourteen thousand, nine hundred eighty-six".