135706237 has 4 divisors (see below), whose sum is σ = 138862240. Its totient is φ = 132550236.

The previous prime is 135706229. The next prime is 135706253. The reversal of 135706237 is 732607531.

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 135706237 - 2³ = 135706229 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 (135706297) 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, 1577937 + ... + 1578022.

It is an arithmetic number, because the mean of its divisors is an integer number (34715560).

Almost surely, 2^135706237 is an apocalyptic number.

It is an amenable number.

135706237 is a deficient number, since it is larger than the sum of its proper divisors (3156003).

135706237 is an equidigital number, since it uses as much as digits as its factorization.

135706237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156002.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 135706237 is about 11649.3019962571. The cubic root of 135706237 is about 513.8857828850.

The spelling of 135706237 in words is "one hundred thirty-five million, seven hundred six thousand, two hundred thirty-seven".