138771129 has 8 divisors (see below), whose sum is σ = 211460800. Its totient is φ = 79297776.

The previous prime is 138771109. The next prime is 138771131. The reversal of 138771129 is 921177831.

138771129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138771129 - 2⁸ = 138770873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138771109) 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, 3304054 + ... + 3304095.

It is an arithmetic number, because the mean of its divisors is an integer number (26432600).

Almost surely, 2^138771129 is an apocalyptic number.

It is an amenable number.

138771129 is a deficient number, since it is larger than the sum of its proper divisors (72689671).

138771129 is an equidigital number, since it uses as much as digits as its factorization.

138771129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608159.

The product of its digits is 21168, while the sum is 39.

The square root of 138771129 is about 11780.1158313490. The cubic root of 138771129 is about 517.7256799986.

The spelling of 138771129 in words is "one hundred thirty-eight million, seven hundred seventy-one thousand, one hundred twenty-nine".