135608471 has 4 divisors (see below), whose sum is σ = 137242392. Its totient is φ = 133974552.

The previous prime is 135608423. The next prime is 135608519. The reversal of 135608471 is 174806531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174806531 = 131 ⋅1334401.

It is an interprime number because it is at equal distance from previous prime (135608423) and next prime (135608519).

It is a cyclic number.

It is not a de Polignac number, because 135608471 - 2¹⁰ = 135607447 is a prime.

It is a super-3 number, since 3×135608471³ (a number of 25 digits) contains 333 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 (135608401) 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, 816836 + ... + 817001.

It is an arithmetic number, because the mean of its divisors is an integer number (34310598).

Almost surely, 2^135608471 is an apocalyptic number.

135608471 is a deficient number, since it is larger than the sum of its proper divisors (1633921).

135608471 is an equidigital number, since it uses as much as digits as its factorization.

135608471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633920.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 135608471 is about 11645.1050231417. The cubic root of 135608471 is about 513.7623480593.

The spelling of 135608471 in words is "one hundred thirty-five million, six hundred eight thousand, four hundred seventy-one".