138869383 has 4 divisors (see below), whose sum is σ = 138940920. Its totient is φ = 138797848.

The previous prime is 138869369. The next prime is 138869407. The reversal of 138869383 is 383968831.

138869383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138869383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138869323) 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, 32773 + ... + 36766.

It is an arithmetic number, because the mean of its divisors is an integer number (34735230).

Almost surely, 2^138869383 is an apocalyptic number.

138869383 is a deficient number, since it is larger than the sum of its proper divisors (71537).

138869383 is an equidigital number, since it uses as much as digits as its factorization.

138869383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71536.

The product of its digits is 746496, while the sum is 49.

The square root of 138869383 is about 11784.2854259391. The cubic root of 138869383 is about 517.8478394578.

The spelling of 138869383 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, three hundred eighty-three".