134639 has 2 divisors, whose sum is σ = 134640. Its totient is φ = 134638.

The previous prime is 134609. The next prime is 134669. The reversal of 134639 is 936431.

It is a balanced prime because it is at equal distance from previous prime (134609) and next prime (134669).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134639 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 (134609) 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, 67319 + 67320.

It is an arithmetic number, because the mean of its divisors is an integer number (67320).

2¹³⁴⁶³⁹ is an apocalyptic number.

134639 is a deficient number, since it is larger than the sum of its proper divisors (1).

134639 is an equidigital number, since it uses as much as digits as its factorization.

134639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 134639 is about 366.9318737859. The cubic root of 134639 is about 51.2535115579.

The spelling of 134639 in words is "one hundred thirty-four thousand, six hundred thirty-nine".