135523137 has 8 divisors (see below), whose sum is σ = 184542336. Its totient is φ = 88426352.

The previous prime is 135523123. The next prime is 135523139. The reversal of 135523137 is 731325531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135523137 - 2¹⁴ = 135506753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135523139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480438 + ... + 480719.

It is an arithmetic number, because the mean of its divisors is an integer number (23067792).

Almost surely, 2^135523137 is an apocalyptic number.

It is an amenable number.

135523137 is a deficient number, since it is larger than the sum of its proper divisors (49019199).

135523137 is an equidigital number, since it uses as much as digits as its factorization.

135523137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961207.

The product of its digits is 9450, while the sum is 30.

The square root of 135523137 is about 11641.4405036490. The cubic root of 135523137 is about 513.6545608022.

Adding to 135523137 its reverse (731325531), we get a palindrome (866848668).

The spelling of 135523137 in words is "one hundred thirty-five million, five hundred twenty-three thousand, one hundred thirty-seven".