135996603 has 4 divisors (see below), whose sum is σ = 181328808. Its totient is φ = 90664400.

The previous prime is 135996599. The next prime is 135996611. The reversal of 135996603 is 306699531.

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 135996603 - 2² = 135996599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135996643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22666098 + ... + 22666103.

It is an arithmetic number, because the mean of its divisors is an integer number (45332202).

Almost surely, 2^135996603 is an apocalyptic number.

135996603 is a deficient number, since it is larger than the sum of its proper divisors (45332205).

135996603 is an equidigital number, since it uses as much as digits as its factorization.

135996603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45332204.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 135996603 is about 11661.7581436077. The cubic root of 135996603 is about 514.2520364080.

It can be divided in two parts, 13599 and 6603, that added together give a palindrome (20202).

The spelling of 135996603 in words is "one hundred thirty-five million, nine hundred ninety-six thousand, six hundred three".