135391871 has 4 divisors (see below), whose sum is σ = 135891744. Its totient is φ = 134892000.

The previous prime is 135391847. The next prime is 135391877. The reversal of 135391871 is 178193531.

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 135391871 - 2¹⁰ = 135390847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135391877) 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, 249530 + ... + 250071.

It is an arithmetic number, because the mean of its divisors is an integer number (33972936).

Almost surely, 2^135391871 is an apocalyptic number.

135391871 is a deficient number, since it is larger than the sum of its proper divisors (499873).

135391871 is an equidigital number, since it uses as much as digits as its factorization.

135391871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499872.

The product of its digits is 22680, while the sum is 38.

The square root of 135391871 is about 11635.8012616235. The cubic root of 135391871 is about 513.4886674551.

The spelling of 135391871 in words is "one hundred thirty-five million, three hundred ninety-one thousand, eight hundred seventy-one".