138185633 has 8 divisors (see below), whose sum is σ = 144460800. Its totient is φ = 131932768.

The previous prime is 138185629. The next prime is 138185647. The reversal of 138185633 is 336581831.

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

It is a cyclic number.

It is not a de Polignac number, because 138185633 - 2² = 138185629 is a prime.

It is a super-2 number, since 2×138185633² = 38190538335221378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138185603) 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, 7808 + ... + 18366.

It is an arithmetic number, because the mean of its divisors is an integer number (18057600).

Almost surely, 2^138185633 is an apocalyptic number.

It is an amenable number.

138185633 is a deficient number, since it is larger than the sum of its proper divisors (6275167).

138185633 is a wasteful number, since it uses less digits than its factorization.

138185633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11151.

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

The square root of 138185633 is about 11755.2385343727. The cubic root of 138185633 is about 516.9965330677.

The spelling of 138185633 in words is "one hundred thirty-eight million, one hundred eighty-five thousand, six hundred thirty-three".