135717919 has 8 divisors (see below), whose sum is σ = 143849520. Its totient is φ = 127602816.

The previous prime is 135717899. The next prime is 135717937. The reversal of 135717919 is 919717531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135717919 - 2¹⁹ = 135193631 is a prime.

It is a super-2 number, since 2×135717919² = 36838707075381122, 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 (135717719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15537 + ... + 22645.

It is an arithmetic number, because the mean of its divisors is an integer number (17981190).

Almost surely, 2^135717919 is an apocalyptic number.

135717919 is a deficient number, since it is larger than the sum of its proper divisors (8131601).

135717919 is a wasteful number, since it uses less digits than its factorization.

135717919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249.

The product of its digits is 59535, while the sum is 43.

The square root of 135717919 is about 11649.8033888989. The cubic root of 135717919 is about 513.9005280719.

The spelling of 135717919 in words is "one hundred thirty-five million, seven hundred seventeen thousand, nine hundred nineteen".