81084081 has 8 divisors (see below), whose sum is σ = 116428480. Its totient is φ = 49897872.

The previous prime is 81084061. The next prime is 81084083. The reversal of 81084081 is 18048018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81084081 - 2⁷ = 81083953 is a prime.

It is a super-2 number, since 2×81084081² = 13149256383229122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (81084083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039501 + ... + 1039578.

It is an arithmetic number, because the mean of its divisors is an integer number (14553560).

Almost surely, 2^81084081 is an apocalyptic number.

It is an amenable number.

81084081 is a deficient number, since it is larger than the sum of its proper divisors (35344399).

81084081 is a wasteful number, since it uses less digits than its factorization.

81084081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079095.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 81084081 is about 9004.6699550844. The cubic root of 81084081 is about 432.8245301673.

The spelling of 81084081 in words is "eighty-one million, eighty-four thousand, eighty-one".