138636933 has 8 divisors (see below), whose sum is σ = 184915296. Its totient is φ = 92391600.

The previous prime is 138636931. The next prime is 138636941. The reversal of 138636933 is 339636831.

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

It is not a de Polignac number, because 138636933 - 2¹ = 138636931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138636931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4243 + ... + 17183.

It is an arithmetic number, because the mean of its divisors is an integer number (23114412).

Almost surely, 2^138636933 is an apocalyptic number.

It is an amenable number.

138636933 is a deficient number, since it is larger than the sum of its proper divisors (46278363).

138636933 is a wasteful number, since it uses less digits than its factorization.

138636933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16515.

The product of its digits is 209952, while the sum is 42.

The square root of 138636933 is about 11774.4185843718. The cubic root of 138636933 is about 517.5587405608.

The spelling of 138636933 in words is "one hundred thirty-eight million, six hundred thirty-six thousand, nine hundred thirty-three".