135388919 has 8 divisors (see below), whose sum is σ = 137652480. Its totient is φ = 133144056.

The previous prime is 135388909. The next prime is 135388931. The reversal of 135388919 is 919883531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135388919 is a prime.

It is a super-2 number, since 2×135388919² = 36660318775977122, 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 (135388909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10322 + ... + 19424.

It is an arithmetic number, because the mean of its divisors is an integer number (17206560).

Almost surely, 2^135388919 is an apocalyptic number.

135388919 is a deficient number, since it is larger than the sum of its proper divisors (2263561).

135388919 is a wasteful number, since it uses less digits than its factorization.

135388919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349.

The product of its digits is 233280, while the sum is 47.

The square root of 135388919 is about 11635.6744110516. The cubic root of 135388919 is about 513.4849354989.

The spelling of 135388919 in words is "one hundred thirty-five million, three hundred eighty-eight thousand, nine hundred nineteen".