82139 has 2 divisors, whose sum is σ = 82140. Its totient is φ = 82138.

The previous prime is 82129. The next prime is 82141. The reversal of 82139 is 93128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82139 - 2⁸ = 81883 is a prime.

It is a Sophie Germain prime.

Together with 82141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41069 + 41070.

It is an arithmetic number, because the mean of its divisors is an integer number (41070).

2⁸²¹³⁹ is an apocalyptic number.

82139 is a deficient number, since it is larger than the sum of its proper divisors (1).

82139 is an equidigital number, since it uses as much as digits as its factorization.

82139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 82139 is about 286.5990230269. The cubic root of 82139 is about 43.4693490865.

The spelling of 82139 in words is "eighty-two thousand, one hundred thirty-nine".