81112703 has 4 divisors (see below), whose sum is σ = 92700240. Its totient is φ = 69525168.

The previous prime is 81112699. The next prime is 81112727. The reversal of 81112703 is 30721118.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81112703 - 2² = 81112699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81112753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5793758 + ... + 5793771.

It is an arithmetic number, because the mean of its divisors is an integer number (23175060).

Almost surely, 2^81112703 is an apocalyptic number.

81112703 is a deficient number, since it is larger than the sum of its proper divisors (11587537).

81112703 is a wasteful number, since it uses less digits than its factorization.

81112703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11587536.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 81112703 is about 9006.2591013139. The cubic root of 81112703 is about 432.8754519849.

The spelling of 81112703 in words is "eighty-one million, one hundred twelve thousand, seven hundred three".