135235437 has 4 divisors (see below), whose sum is σ = 180313920. Its totient is φ = 90156956.

The previous prime is 135235433. The next prime is 135235501. The reversal of 135235437 is 734532531.

135235437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 135235437 - 2² = 135235433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135235398 and 135235407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135235433) 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, 22539237 + ... + 22539242.

It is an arithmetic number, because the mean of its divisors is an integer number (45078480).

Almost surely, 2^135235437 is an apocalyptic number.

It is an amenable number.

135235437 is a deficient number, since it is larger than the sum of its proper divisors (45078483).

135235437 is an equidigital number, since it uses as much as digits as its factorization.

135235437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45078482.

The product of its digits is 37800, while the sum is 33.

The square root of 135235437 is about 11629.0772204849. The cubic root of 135235437 is about 513.2908268152.

Adding to 135235437 its reverse (734532531), we get a palindrome (869767968).

The spelling of 135235437 in words is "one hundred thirty-five million, two hundred thirty-five thousand, four hundred thirty-seven".