135915839 has 2 divisors, whose sum is σ = 135915840. Its totient is φ = 135915838.

The previous prime is 135915827. The next prime is 135915841. The reversal of 135915839 is 938519531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135915839 - 2⁴ = 135915823 is a prime.

Together with 135915841, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135915839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135915859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67957919 + 67957920.

It is an arithmetic number, because the mean of its divisors is an integer number (67957920).

Almost surely, 2^135915839 is an apocalyptic number.

135915839 is a deficient number, since it is larger than the sum of its proper divisors (1).

135915839 is an equidigital number, since it uses as much as digits as its factorization.

135915839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 44.

The square root of 135915839 is about 11658.2948581686. The cubic root of 135915839 is about 514.1502170121.

The spelling of 135915839 in words is "one hundred thirty-five million, nine hundred fifteen thousand, eight hundred thirty-nine".