135638619 has 32 divisors (see below), whose sum is σ = 191009280.
Its totient is φ = 85536000.
The previous prime is 135638617. The next prime is 135638627. The reversal of 135638619 is 916836531.
It is a happy number.
135638619 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 135638619 - 21 = 135638617 is a prime.
It is a super-2 number, since 2×1356386192 = 36795669928454322, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (135638611) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 898194 + ... + 898344.
It is an arithmetic number, because the mean of its divisors is an integer number (5969040).
Almost surely, 2135638619 is an apocalyptic number.
135638619 is a deficient number, since it is larger than the sum of its proper divisors (55370661).
135638619 is a wasteful number, since it uses less digits than its factorization.
135638619 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 371.
The product of its digits is 116640, while the sum is 42.
The square root of 135638619 is about 11646.3994006732.
The cubic root of 135638619 is about 513.8004178532.
The spelling of 135638619 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, six hundred nineteen".