135638427 has 16 divisors (see below), whose sum is σ = 191741472. Its totient is φ = 84994560.

The previous prime is 135638417. The next prime is 135638431. The reversal of 135638427 is 724836531.

135638427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135638427 - 2⁸ = 135638171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135638407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55777 + ... + 58157.

It is an arithmetic number, because the mean of its divisors is an integer number (11983842).

Almost surely, 2^135638427 is an apocalyptic number.

135638427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

135638427 is a deficient number, since it is larger than the sum of its proper divisors (56103045).

135638427 is a wasteful number, since it uses less digits than its factorization.

135638427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518.

The product of its digits is 120960, while the sum is 39.

The square root of 135638427 is about 11646.3911577793. The cubic root of 135638427 is about 513.8001754204.

The spelling of 135638427 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, four hundred twenty-seven".