135538207 has 4 divisors (see below), whose sum is σ = 154900816. Its totient is φ = 116175600.

The previous prime is 135538201. The next prime is 135538237. The reversal of 135538207 is 702835531.

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 135538207 - 2¹⁹ = 135013919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135538201) 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, 9681294 + ... + 9681307.

It is an arithmetic number, because the mean of its divisors is an integer number (38725204).

Almost surely, 2^135538207 is an apocalyptic number.

135538207 is a deficient number, since it is larger than the sum of its proper divisors (19362609).

135538207 is an equidigital number, since it uses as much as digits as its factorization.

135538207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19362608.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 135538207 is about 11642.0877423253. The cubic root of 135538207 is about 513.6735993405.

The spelling of 135538207 in words is "one hundred thirty-five million, five hundred thirty-eight thousand, two hundred seven".