138182121397 has 4 divisors (see below), whose sum is σ = 142639609216. Its totient is φ = 133724633580.

The previous prime is 138182121391. The next prime is 138182121403. The reversal of 138182121397 is 793121281831.

138182121397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (138182121391) and next prime (138182121403).

It is a cyclic number.

It is not a de Polignac number, because 138182121397 - 2¹¹ = 138182119349 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 (138182121391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228743863 + ... + 2228743924.

It is an arithmetic number, because the mean of its divisors is an integer number (35659902304).

Almost surely, 2^138182121397 is an apocalyptic number.

It is an amenable number.

138182121397 is a deficient number, since it is larger than the sum of its proper divisors (4457487819).

138182121397 is an equidigital number, since it uses as much as digits as its factorization.

138182121397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457487818.

The product of its digits is 145152, while the sum is 46.

The spelling of 138182121397 in words is "one hundred thirty-eight billion, one hundred eighty-two million, one hundred twenty-one thousand, three hundred ninety-seven".