135638203 has 4 divisors (see below), whose sum is σ = 135719280. Its totient is φ = 135557128.

The previous prime is 135638179. The next prime is 135638213. The reversal of 135638203 is 302836531.

135638203 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.

It is a cyclic number.

It is not a de Polignac number, because 135638203 - 2⁵ = 135638171 is a prime.

It is a super-2 number, since 2×135638203² = 36795444226138418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135638213) 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, 37975 + ... + 41392.

It is an arithmetic number, because the mean of its divisors is an integer number (33929820).

Almost surely, 2^135638203 is an apocalyptic number.

135638203 is a deficient number, since it is larger than the sum of its proper divisors (81077).

135638203 is an equidigital number, since it uses as much as digits as its factorization.

135638203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81076.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 135638203 is about 11646.3815410624. The cubic root of 135638203 is about 513.7998925819.

The spelling of 135638203 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, two hundred three".