82117943 has 4 divisors (see below), whose sum is σ = 86439960. Its totient is φ = 77795928.

The previous prime is 82117927. The next prime is 82117951. The reversal of 82117943 is 34971128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82117943 - 2⁴ = 82117927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82117963) 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 3 ways as a sum of consecutive naturals, for example, 2160980 + ... + 2161017.

It is an arithmetic number, because the mean of its divisors is an integer number (21609990).

Almost surely, 2^82117943 is an apocalyptic number.

82117943 is a deficient number, since it is larger than the sum of its proper divisors (4322017).

82117943 is a wasteful number, since it uses less digits than its factorization.

82117943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322016.

The product of its digits is 12096, while the sum is 35.

The square root of 82117943 is about 9061.8951108474. The cubic root of 82117943 is about 434.6563419544.

The spelling of 82117943 in words is "eighty-two million, one hundred seventeen thousand, nine hundred forty-three".