138079 has 2 divisors, whose sum is σ = 138080. Its totient is φ = 138078.

The previous prime is 138077. The next prime is 138101. The reversal of 138079 is 970831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138079 - 2¹ = 138077 is a prime.

Together with 138077, it forms a pair of twin primes.

It is a Chen prime.

138079 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138071) 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 as a sum of consecutive naturals, namely, 69039 + 69040.

It is an arithmetic number, because the mean of its divisors is an integer number (69040).

2¹³⁸⁰⁷⁹ is an apocalyptic number.

138079 is a deficient number, since it is larger than the sum of its proper divisors (1).

138079 is an equidigital number, since it uses as much as digits as its factorization.

138079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 138079 is about 371.5898276326. The cubic root of 138079 is about 51.6863516158.

The spelling of 138079 in words is "one hundred thirty-eight thousand, seventy-nine".