81593714 has 16 divisors (see below), whose sum is σ = 129554880. Its totient is φ = 38432880.

The previous prime is 81593669. The next prime is 81593717. The reversal of 81593714 is 41739518.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81593717) 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 in 7 ways as a sum of consecutive naturals, for example, 947 + ... + 12809.

It is an arithmetic number, because the mean of its divisors is an integer number (8097180).

Almost surely, 2^81593714 is an apocalyptic number.

81593714 is a deficient number, since it is larger than the sum of its proper divisors (47961166).

81593714 is a wasteful number, since it uses less digits than its factorization.

81593714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12065.

The product of its digits is 30240, while the sum is 38.

The square root of 81593714 is about 9032.9238898598. The cubic root of 81593714 is about 433.7294391281.

The spelling of 81593714 in words is "eighty-one million, five hundred ninety-three thousand, seven hundred fourteen".