135691183 has 4 divisors (see below), whose sum is σ = 138251448. Its totient is φ = 133130920.

The previous prime is 135691163. The next prime is 135691189. The reversal of 135691183 is 381196531.

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 135691183 - 2⁵ = 135691151 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 (135691189) 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, 1280053 + ... + 1280158.

It is an arithmetic number, because the mean of its divisors is an integer number (34562862).

Almost surely, 2^135691183 is an apocalyptic number.

135691183 is a deficient number, since it is larger than the sum of its proper divisors (2560265).

135691183 is an equidigital number, since it uses as much as digits as its factorization.

135691183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560264.

The product of its digits is 19440, while the sum is 37.

The square root of 135691183 is about 11648.6558452038. The cubic root of 135691183 is about 513.8667802638.

The spelling of 135691183 in words is "one hundred thirty-five million, six hundred ninety-one thousand, one hundred eighty-three".