139238229 has 16 divisors (see below), whose sum is σ = 202674752. Its totient is φ = 84509568.

The previous prime is 139238201. The next prime is 139238233. The reversal of 139238229 is 922832931.

It is not a de Polignac number, because 139238229 - 2¹³ = 139230037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139238269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21607 + ... + 27300.

It is an arithmetic number, because the mean of its divisors is an integer number (12667172).

Almost surely, 2^139238229 is an apocalyptic number.

It is an amenable number.

139238229 is a deficient number, since it is larger than the sum of its proper divisors (63436523).

139238229 is a wasteful number, since it uses less digits than its factorization.

139238229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48996.

The product of its digits is 46656, while the sum is 39.

The square root of 139238229 is about 11799.9249573885. The cubic root of 139238229 is about 518.3059131791.

It can be divided in two parts, 1392 and 38229, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 139238229 in words is "one hundred thirty-nine million, two hundred thirty-eight thousand, two hundred twenty-nine".