138533883 has 16 divisors (see below), whose sum is σ = 199691520. Its totient is φ = 85129056.

The previous prime is 138533881. The next prime is 138533909. The reversal of 138533883 is 388335831.

It is not a de Polignac number, because 138533883 - 2¹ = 138533881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138533881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30735 + ... + 34952.

It is an arithmetic number, because the mean of its divisors is an integer number (12480720).

Almost surely, 2^138533883 is an apocalyptic number.

138533883 is a deficient number, since it is larger than the sum of its proper divisors (61157637).

138533883 is a wasteful number, since it uses less digits than its factorization.

138533883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65746.

The product of its digits is 207360, while the sum is 42.

The square root of 138533883 is about 11770.0417586345. The cubic root of 138533883 is about 517.4304735179.

The spelling of 138533883 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, eight hundred eighty-three".