138889029 has 8 divisors (see below), whose sum is σ = 185463232. Its totient is φ = 92453760.

The previous prime is 138889013. The next prime is 138889063. The reversal of 138889029 is 920988831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138889029 - 2⁴ = 138889013 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 (138889229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32377 + ... + 36414.

It is an arithmetic number, because the mean of its divisors is an integer number (23182904).

Almost surely, 2^138889029 is an apocalyptic number.

It is an amenable number.

138889029 is a deficient number, since it is larger than the sum of its proper divisors (46574203).

138889029 is an equidigital number, since it uses as much as digits as its factorization.

138889029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69467.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 138889029 is about 11785.1189641853. The cubic root of 138889029 is about 517.8722584687.

The spelling of 138889029 in words is "one hundred thirty-eight million, eight hundred eighty-nine thousand, twenty-nine".