81417841 has 8 divisors (see below), whose sum is σ = 83962368. Its totient is φ = 78900000.

The previous prime is 81417839. The next prime is 81417883. The reversal of 81417841 is 14871418.

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 81417841 - 2¹ = 81417839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81417797 and 81417806.

It is not an unprimeable number, because it can be changed into a prime (81417821) 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, 385 + ... + 12766.

It is an arithmetic number, because the mean of its divisors is an integer number (10495296).

Almost surely, 2^81417841 is an apocalyptic number.

It is an amenable number.

81417841 is a deficient number, since it is larger than the sum of its proper divisors (2544527).

81417841 is a wasteful number, since it uses less digits than its factorization.

81417841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13343.

The product of its digits is 7168, while the sum is 34.

The square root of 81417841 is about 9023.1835291099. The cubic root of 81417841 is about 433.4175843416.

The spelling of 81417841 in words is "eighty-one million, four hundred seventeen thousand, eight hundred forty-one".