138829111 has 4 divisors (see below), whose sum is σ = 139761000. Its totient is φ = 137897224.

The previous prime is 138829099. The next prime is 138829133. The reversal of 138829111 is 111928831.

It is a happy number.

138829111 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 not a de Polignac number, because 138829111 - 2¹¹ = 138827063 is a prime.

It is a super-2 number, since 2×138829111² = 38547044122100642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138829151) 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, 465721 + ... + 466018.

It is an arithmetic number, because the mean of its divisors is an integer number (34940250).

Almost surely, 2^138829111 is an apocalyptic number.

138829111 is a deficient number, since it is larger than the sum of its proper divisors (931889).

138829111 is an equidigital number, since it uses as much as digits as its factorization.

138829111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931888.

The product of its digits is 3456, while the sum is 34.

The square root of 138829111 is about 11782.5765857897. The cubic root of 138829111 is about 517.7977761441.

The spelling of 138829111 in words is "one hundred thirty-eight million, eight hundred twenty-nine thousand, one hundred eleven".