135908719 has 4 divisors (see below), whose sum is σ = 136450440. Its totient is φ = 135367000.

The previous prime is 135908657. The next prime is 135908723. The reversal of 135908719 is 917809531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135908719 - 2¹¹ = 135906671 is a prime.

It is a super-2 number, since 2×135908719² = 36942359800441922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135908749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270484 + ... + 270985.

It is an arithmetic number, because the mean of its divisors is an integer number (34112610).

Almost surely, 2^135908719 is an apocalyptic number.

135908719 is a deficient number, since it is larger than the sum of its proper divisors (541721).

135908719 is an equidigital number, since it uses as much as digits as its factorization.

135908719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541720.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 135908719 is about 11657.9894921895. The cubic root of 135908719 is about 514.1412388741.

The spelling of 135908719 in words is "one hundred thirty-five million, nine hundred eight thousand, seven hundred nineteen".