82138079 has 2 divisors, whose sum is σ = 82138080. Its totient is φ = 82138078.

The previous prime is 82138073. The next prime is 82138097. The reversal of 82138079 is 97083128.

Together with next prime (82138097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82138079 - 2⁸ = 82137823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82138073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41069039 + 41069040.

It is an arithmetic number, because the mean of its divisors is an integer number (41069040).

Almost surely, 2^82138079 is an apocalyptic number.

82138079 is a deficient number, since it is larger than the sum of its proper divisors (1).

82138079 is an equidigital number, since it uses as much as digits as its factorization.

82138079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 82138079 is about 9063.0060686287. The cubic root of 82138079 is about 434.6918661631.

The spelling of 82138079 in words is "eighty-two million, one hundred thirty-eight thousand, seventy-nine".