138641683 has 4 divisors (see below), whose sum is σ = 138668760. Its totient is φ = 138614608.

The previous prime is 138641617. The next prime is 138641687. The reversal of 138641683 is 386146831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 386146831 = 7 ⋅55163833.

It is a cyclic number.

It is not a de Polignac number, because 138641683 - 2¹³ = 138633491 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138641687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253 + ... + 16966.

It is an arithmetic number, because the mean of its divisors is an integer number (34667190).

Almost surely, 2^138641683 is an apocalyptic number.

138641683 is a deficient number, since it is larger than the sum of its proper divisors (27077).

138641683 is an equidigital number, since it uses as much as digits as its factorization.

138641683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27076.

The product of its digits is 82944, while the sum is 40.

The square root of 138641683 is about 11774.6202911177. The cubic root of 138641683 is about 517.5646513858.

The spelling of 138641683 in words is "one hundred thirty-eight million, six hundred forty-one thousand, six hundred eighty-three".