82143317 has 4 divisors (see below), whose sum is σ = 82186176. Its totient is φ = 82100460.

The previous prime is 82143307. The next prime is 82143319. The reversal of 82143317 is 71334128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82143317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82143317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82143319) 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, 18413 + ... + 22434.

It is an arithmetic number, because the mean of its divisors is an integer number (20546544).

Almost surely, 2^82143317 is an apocalyptic number.

It is an amenable number.

82143317 is a deficient number, since it is larger than the sum of its proper divisors (42859).

82143317 is a wasteful number, since it uses less digits than its factorization.

82143317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42858.

The product of its digits is 4032, while the sum is 29.

The square root of 82143317 is about 9063.2950409881. The cubic root of 82143317 is about 434.7011061633.

The spelling of 82143317 in words is "eighty-two million, one hundred forty-three thousand, three hundred seventeen".