135391869 has 12 divisors (see below), whose sum is σ = 204069216. Its totient is φ = 86336712.

The previous prime is 135391847. The next prime is 135391877. The reversal of 135391869 is 968193531.

135391869 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 135391869 - 2¹⁵ = 135359101 is a prime.

It is a super-2 number, since 2×135391869² = 36661916382626322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135391829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326827 + ... + 327240.

It is an arithmetic number, because the mean of its divisors is an integer number (17005768).

Almost surely, 2^135391869 is an apocalyptic number.

It is an amenable number.

135391869 is a deficient number, since it is larger than the sum of its proper divisors (68677347).

135391869 is a wasteful number, since it uses less digits than its factorization.

135391869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654096 (or 654093 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 135391869 is about 11635.8011756819. The cubic root of 135391869 is about 513.4886649267.

The spelling of 135391869 in words is "one hundred thirty-five million, three hundred ninety-one thousand, eight hundred sixty-nine".