135243497 has 8 divisors (see below), whose sum is σ = 137347200. Its totient is φ = 133149744.

The previous prime is 135243469. The next prime is 135243503. The reversal of 135243497 is 794342531.

135243497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135243497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135243497.

It is not an unprimeable number, because it can be changed into a prime (135243457) 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, 27683 + ... + 32199.

It is an arithmetic number, because the mean of its divisors is an integer number (17168400).

Almost surely, 2^135243497 is an apocalyptic number.

It is an amenable number.

135243497 is a deficient number, since it is larger than the sum of its proper divisors (2103703).

135243497 is an equidigital number, since it uses as much as digits as its factorization.

135243497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975.

The product of its digits is 90720, while the sum is 38.

The square root of 135243497 is about 11629.4237604449. The cubic root of 135243497 is about 513.3010239499.

It can be divided in two parts, 1352434 and 97, that added together give a palindrome (1352531).

The spelling of 135243497 in words is "one hundred thirty-five million, two hundred forty-three thousand, four hundred ninety-seven".