135725839 has 2 divisors, whose sum is σ = 135725840. Its totient is φ = 135725838.

The previous prime is 135725831. The next prime is 135725851. The reversal of 135725839 is 938527531.

It is a weak prime.

It is an emirp because it is prime and its reverse (938527531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135725839 - 2³ = 135725831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135725795 and 135725804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135725831) 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, 67862919 + 67862920.

It is an arithmetic number, because the mean of its divisors is an integer number (67862920).

Almost surely, 2^135725839 is an apocalyptic number.

135725839 is a deficient number, since it is larger than the sum of its proper divisors (1).

135725839 is an equidigital number, since it uses as much as digits as its factorization.

135725839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 135725839 is about 11650.1433038397. The cubic root of 135725839 is about 513.9105243274.

The spelling of 135725839 in words is "one hundred thirty-five million, seven hundred twenty-five thousand, eight hundred thirty-nine".