138144935 has 4 divisors (see below), whose sum is σ = 165773928. Its totient is φ = 110515944.

The previous prime is 138144911. The next prime is 138144947. The reversal of 138144935 is 539441831.

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 138144935 - 2⁸ = 138144679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13814489 + ... + 13814498.

It is an arithmetic number, because the mean of its divisors is an integer number (41443482).

Almost surely, 2^138144935 is an apocalyptic number.

138144935 is a deficient number, since it is larger than the sum of its proper divisors (27628993).

138144935 is an equidigital number, since it uses as much as digits as its factorization.

138144935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27628992.

The product of its digits is 51840, while the sum is 38.

The square root of 138144935 is about 11753.5073488725. The cubic root of 138144935 is about 516.9457733507.

The spelling of 138144935 in words is "one hundred thirty-eight million, one hundred forty-four thousand, nine hundred thirty-five".