138393935 has 8 divisors (see below), whose sum is σ = 166150656. Its totient is φ = 110663200.

The previous prime is 138393883. The next prime is 138393961. The reversal of 138393935 is 539393831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138393935 - 2⁸ = 138393679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8285 + ... + 18585.

It is an arithmetic number, because the mean of its divisors is an integer number (20768832).

Almost surely, 2^138393935 is an apocalyptic number.

138393935 is a deficient number, since it is larger than the sum of its proper divisors (27756721).

138393935 is a wasteful number, since it uses less digits than its factorization.

138393935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993.

The product of its digits is 262440, while the sum is 44.

The square root of 138393935 is about 11764.0951628249. The cubic root of 138393935 is about 517.2561773909.

The spelling of 138393935 in words is "one hundred thirty-eight million, three hundred ninety-three thousand, nine hundred thirty-five".