135518839 has 2 divisors, whose sum is σ = 135518840. Its totient is φ = 135518838.

The previous prime is 135518837. The next prime is 135518857. The reversal of 135518839 is 938815531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135518839 - 2¹ = 135518837 is a prime.

Together with 135518837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 135518795 and 135518804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135518837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67759419 + 67759420.

It is an arithmetic number, because the mean of its divisors is an integer number (67759420).

Almost surely, 2^135518839 is an apocalyptic number.

135518839 is a deficient number, since it is larger than the sum of its proper divisors (1).

135518839 is an equidigital number, since it uses as much as digits as its factorization.

135518839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The square root of 135518839 is about 11641.2559030373. The cubic root of 135518839 is about 513.6491307069.

The spelling of 135518839 in words is "one hundred thirty-five million, five hundred eighteen thousand, eight hundred thirty-nine".