138984111 has 12 divisors (see below), whose sum is σ = 229434192. Its totient is φ = 79419456.

The previous prime is 138984103. The next prime is 138984113. The reversal of 138984111 is 111489831.

138984111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138984111 - 2³ = 138984103 is a prime.

It is a super-2 number, since 2×138984111² = 38633166220920642, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138984113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1102986 + ... + 1103111.

It is an arithmetic number, because the mean of its divisors is an integer number (19119516).

Almost surely, 2^138984111 is an apocalyptic number.

138984111 is a deficient number, since it is larger than the sum of its proper divisors (90450081).

138984111 is a wasteful number, since it uses less digits than its factorization.

138984111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206110 (or 2206107 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 138984111 is about 11789.1522595987. The cubic root of 138984111 is about 517.9904081844.

It can be divided in two parts, 1389841 and 11, that multiplied together give a palindrome (15288251).

The spelling of 138984111 in words is "one hundred thirty-eight million, nine hundred eighty-four thousand, one hundred eleven".