81113704 has 32 divisors (see below), whose sum is σ = 175452480. Its totient is φ = 34435584.

The previous prime is 81113693. The next prime is 81113707. The reversal of 81113704 is 40731118.

It is not an unprimeable number, because it can be changed into a prime (81113707) 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, 777 + ... + 12760.

It is an arithmetic number, because the mean of its divisors is an integer number (5482890).

Almost surely, 2^81113704 is an apocalyptic number.

It is an amenable number.

81113704 is an abundant number, since it is smaller than the sum of its proper divisors (94338776).

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

81113704 is a wasteful number, since it uses less digits than its factorization.

81113704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13657 (or 13653 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 81113704 is about 9006.3146736054. The cubic root of 81113704 is about 432.8772326618.

The spelling of 81113704 in words is "eighty-one million, one hundred thirteen thousand, seven hundred four".