135604437 has 4 divisors (see below), whose sum is σ = 180805920. Its totient is φ = 90402956.

The previous prime is 135604429. The next prime is 135604439. The reversal of 135604437 is 734406531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135604437 - 2³ = 135604429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135604398 and 135604407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135604439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22600737 + ... + 22600742.

It is an arithmetic number, because the mean of its divisors is an integer number (45201480).

Almost surely, 2^135604437 is an apocalyptic number.

It is an amenable number.

135604437 is a deficient number, since it is larger than the sum of its proper divisors (45201483).

135604437 is an equidigital number, since it uses as much as digits as its factorization.

135604437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45201482.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 135604437 is about 11644.9318160305. The cubic root of 135604437 is about 513.7572536434.

The spelling of 135604437 in words is "one hundred thirty-five million, six hundred four thousand, four hundred thirty-seven".