81003284867 has 4 divisors (see below), whose sum is σ = 81838370376. Its totient is φ = 80168199360.

The previous prime is 81003284833. The next prime is 81003284891. The reversal of 81003284867 is 76848230018.

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 81003284867 - 2¹⁰ = 81003283843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81003284807) 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, 417542609 + ... + 417542802.

It is an arithmetic number, because the mean of its divisors is an integer number (20459592594).

Almost surely, 2^81003284867 is an apocalyptic number.

81003284867 is a deficient number, since it is larger than the sum of its proper divisors (835085509).

81003284867 is an equidigital number, since it uses as much as digits as its factorization.

81003284867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835085508.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 81003284867 in words is "eighty-one billion, three million, two hundred eighty-four thousand, eight hundred sixty-seven".