135618671 has 4 divisors (see below), whose sum is σ = 135819672. Its totient is φ = 135417672.

The previous prime is 135618647. The next prime is 135618709. The reversal of 135618671 is 176816531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176816531 = 191 ⋅925741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135618671 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 (135618071) 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, 99485 + ... + 100838.

It is an arithmetic number, because the mean of its divisors is an integer number (33954918).

Almost surely, 2^135618671 is an apocalyptic number.

135618671 is a deficient number, since it is larger than the sum of its proper divisors (201001).

135618671 is an equidigital number, since it uses as much as digits as its factorization.

135618671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201000.

The product of its digits is 30240, while the sum is 38.

The square root of 135618671 is about 11645.5429671613. The cubic root of 135618671 is about 513.7752288785.

The spelling of 135618671 in words is "one hundred thirty-five million, six hundred eighteen thousand, six hundred seventy-one".