135391671 has 6 divisors (see below), whose sum is σ = 195565760. Its totient is φ = 90261108.

The previous prime is 135391667. The next prime is 135391693. The reversal of 135391671 is 176193531.

135391671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135391671 - 2² = 135391667 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 (135391171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7521751 + ... + 7521768.

Almost surely, 2^135391671 is an apocalyptic number.

135391671 is a deficient number, since it is larger than the sum of its proper divisors (60174089).

135391671 is a wasteful number, since it uses less digits than its factorization.

135391671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043525 (or 15043522 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 135391671 is about 11635.7926674550. The cubic root of 135391671 is about 513.4884146142.

It can be divided in two parts, 13 and 5391671, that added together give a square (5391684 = 2322²).

The spelling of 135391671 in words is "one hundred thirty-five million, three hundred ninety-one thousand, six hundred seventy-one".