81110347 has 4 divisors (see below), whose sum is σ = 81397240. Its totient is φ = 80823456.

The previous prime is 81110317. The next prime is 81110357. The reversal of 81110347 is 74301118.

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 81110347 - 2²³ = 72721739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81110317) 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, 143022 + ... + 143587.

It is an arithmetic number, because the mean of its divisors is an integer number (20349310).

Almost surely, 2^81110347 is an apocalyptic number.

81110347 is a deficient number, since it is larger than the sum of its proper divisors (286893).

81110347 is a wasteful number, since it uses less digits than its factorization.

81110347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286892.

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

The square root of 81110347 is about 9006.1283024394. The cubic root of 81110347 is about 432.8712608434.

The spelling of 81110347 in words is "eighty-one million, one hundred ten thousand, three hundred forty-seven".