81799314 has 32 divisors (see below), whose sum is σ = 169888320. Its totient is φ = 26225472.

The previous prime is 81799307. The next prime is 81799327. The reversal of 81799314 is 41399718.

It is a happy number.

It is a super-2 number, since 2×81799314² = 13382255541741192, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54417 + ... + 55899.

It is an arithmetic number, because the mean of its divisors is an integer number (5309010).

Almost surely, 2^81799314 is an apocalyptic number.

81799314 is an abundant number, since it is smaller than the sum of its proper divisors (88089006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81799314 is a wasteful number, since it uses less digits than its factorization.

81799314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834.

The product of its digits is 54432, while the sum is 42.

The square root of 81799314 is about 9044.2973193057. The cubic root of 81799314 is about 434.0934376605.

The spelling of 81799314 in words is "eighty-one million, seven hundred ninety-nine thousand, three hundred fourteen".