138971712 has 112 divisors (see below), whose sum is σ = 415137600. Its totient is φ = 40642560.

The previous prime is 138971711. The next prime is 138971713. The reversal of 138971712 is 217179831.

It is an interprime number because it is at equal distance from previous prime (138971711) and next prime (138971713).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138971711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60114 + ... + 62382.

Almost surely, 2^138971712 is an apocalyptic number.

138971712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138971712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207568800).

138971712 is an abundant number, since it is smaller than the sum of its proper divisors (276165888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138971712 is a wasteful number, since it uses less digits than its factorization.

138971712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2314 counting only the distinct ones).

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

The square root of 138971712 is about 11788.6263830864. The cubic root of 138971712 is about 517.9750041357.

The spelling of 138971712 in words is "one hundred thirty-eight million, nine hundred seventy-one thousand, seven hundred twelve".