138112357 has 6 divisors (see below), whose sum is σ = 140417394. Its totient is φ = 135844560.

The previous prime is 138112319. The next prime is 138112397. The reversal of 138112357 is 753211831.

It can be written as a sum of positive squares in 3 ways, for example, as 3876961 + 134235396 = 1969^2 + 11586^2 .

It is not a de Polignac number, because 138112357 - 2¹¹ = 138110309 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 (138112307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14838 + ... + 22279.

It is an arithmetic number, because the mean of its divisors is an integer number (23402899).

Almost surely, 2^138112357 is an apocalyptic number.

It is an amenable number.

138112357 is a deficient number, since it is larger than the sum of its proper divisors (2305037).

138112357 is an frugal number, since it uses more digits than its factorization.

138112357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37239 (or 37178 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 138112357 is about 11752.1213829674. The cubic root of 138112357 is about 516.9051339468.

The spelling of 138112357 in words is "one hundred thirty-eight million, one hundred twelve thousand, three hundred fifty-seven".