135683519 has 2 divisors, whose sum is σ = 135683520. Its totient is φ = 135683518.

The previous prime is 135683491. The next prime is 135683521. The reversal of 135683519 is 915386531.

It is a strong prime.

It is an emirp because it is prime and its reverse (915386531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135683519 - 2²⁰ = 134634943 is a prime.

It is a super-2 number, since 2×135683519² = 36820034656446722, which contains 22 as substring.

Together with 135683521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135683419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67841759 + 67841760.

It is an arithmetic number, because the mean of its divisors is an integer number (67841760).

Almost surely, 2^135683519 is an apocalyptic number.

135683519 is a deficient number, since it is larger than the sum of its proper divisors (1).

135683519 is an equidigital number, since it uses as much as digits as its factorization.

135683519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 135683519 is about 11648.3268755646. The cubic root of 135683519 is about 513.8571054786.

The spelling of 135683519 in words is "one hundred thirty-five million, six hundred eighty-three thousand, five hundred nineteen".