81835411 has 8 divisors (see below), whose sum is σ = 94577760. Its totient is φ = 69355968.

The previous prime is 81835387. The next prime is 81835417. The reversal of 81835411 is 11453818.

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 81835411 - 2⁷ = 81835283 is a prime.

It is a super-3 number, since 3×81835411³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81835417) 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, 65056 + ... + 66301.

It is an arithmetic number, because the mean of its divisors is an integer number (11822220).

Almost surely, 2^81835411 is an apocalyptic number.

81835411 is a deficient number, since it is larger than the sum of its proper divisors (12742349).

81835411 is a wasteful number, since it uses less digits than its factorization.

81835411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131453.

The product of its digits is 3840, while the sum is 31.

The square root of 81835411 is about 9046.2926660594. The cubic root of 81835411 is about 434.1572815801.

The spelling of 81835411 in words is "eighty-one million, eight hundred thirty-five thousand, four hundred eleven".