81084814 has 8 divisors (see below), whose sum is σ = 122764248. Its totient is φ = 40163400.

The previous prime is 81084811. The next prime is 81084827. The reversal of 81084814 is 41848018.

It is a happy number.

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

It is a super-2 number, since 2×81084814² = 13149494122829192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81084814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81084811) 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, 189237 + ... + 189664.

It is an arithmetic number, because the mean of its divisors is an integer number (15345531).

Almost surely, 2^81084814 is an apocalyptic number.

81084814 is a deficient number, since it is larger than the sum of its proper divisors (41679434).

81084814 is a wasteful number, since it uses less digits than its factorization.

81084814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379010.

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 81084814 is about 9004.7106560955. The cubic root of 81084814 is about 432.8258344078.

The spelling of 81084814 in words is "eighty-one million, eighty-four thousand, eight hundred fourteen".