82170113 has 4 divisors (see below), whose sum is σ = 82375428. Its totient is φ = 81964800.

The previous prime is 82170107. The next prime is 82170131. The reversal of 82170113 is 31107128.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72726784 + 9443329 = 8528^2 + 3073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82170113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82170103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102056 + ... + 102857.

It is an arithmetic number, because the mean of its divisors is an integer number (20593857).

Almost surely, 2^82170113 is an apocalyptic number.

It is an amenable number.

82170113 is a deficient number, since it is larger than the sum of its proper divisors (205315).

82170113 is a wasteful number, since it uses less digits than its factorization.

82170113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205314.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 82170113 is about 9064.7731907643. The cubic root of 82170113 is about 434.7483690241.

The spelling of 82170113 in words is "eighty-two million, one hundred seventy thousand, one hundred thirteen".