81834355 has 8 divisors (see below), whose sum is σ = 98975232. Its totient is φ = 64951488.

The previous prime is 81834329. The next prime is 81834359. The reversal of 81834355 is 55343818.

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

It is a cyclic number.

It is not a de Polignac number, because 81834355 - 2⁵ = 81834323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81834359) 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 7 ways as a sum of consecutive naturals, for example, 63802 + ... + 65071.

It is an arithmetic number, because the mean of its divisors is an integer number (12371904).

Almost surely, 2^81834355 is an apocalyptic number.

81834355 is a deficient number, since it is larger than the sum of its proper divisors (17140877).

81834355 is a wasteful number, since it uses less digits than its factorization.

81834355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129005.

The product of its digits is 57600, while the sum is 37.

The square root of 81834355 is about 9046.2342994198. The cubic root of 81834355 is about 434.1554141242.

The spelling of 81834355 in words is "eighty-one million, eight hundred thirty-four thousand, three hundred fifty-five".