81864314 has 32 divisors (see below), whose sum is σ = 148006656. Its totient is φ = 33200640.

The previous prime is 81864301. The next prime is 81864347. The reversal of 81864314 is 41346818.

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 15 ways as a sum of consecutive naturals, for example, 29924 + ... + 32544.

It is an arithmetic number, because the mean of its divisors is an integer number (4625208).

Almost surely, 2^81864314 is an apocalyptic number.

81864314 is a deficient number, since it is larger than the sum of its proper divisors (66142342).

81864314 is a wasteful number, since it uses less digits than its factorization.

81864314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750.

The product of its digits is 18432, while the sum is 35.

The square root of 81864314 is about 9047.8900302778. The cubic root of 81864314 is about 434.2083881069.

The spelling of 81864314 in words is "eighty-one million, eight hundred sixty-four thousand, three hundred fourteen".