81014347 has 4 divisors (see below), whose sum is σ = 85278280. Its totient is φ = 76750416.

The previous prime is 81014327. The next prime is 81014363. The reversal of 81014347 is 74341018.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81014347 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81014327) 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 3 ways as a sum of consecutive naturals, for example, 2131938 + ... + 2131975.

It is an arithmetic number, because the mean of its divisors is an integer number (21319570).

Almost surely, 2^81014347 is an apocalyptic number.

81014347 is a deficient number, since it is larger than the sum of its proper divisors (4263933).

81014347 is a wasteful number, since it uses less digits than its factorization.

81014347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263932.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81014347 is about 9000.7970202644. The cubic root of 81014347 is about 432.7004152071.

The spelling of 81014347 in words is "eighty-one million, fourteen thousand, three hundred forty-seven".