138195023389 has 2 divisors, whose sum is σ = 138195023390. Its totient is φ = 138195023388.

The previous prime is 138195023387. The next prime is 138195023401. The reversal of 138195023389 is 983320591831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137425904100 + 769119289 = 370710^2 + 27733^2 .

It is a cyclic number.

It is not a de Polignac number, because 138195023389 - 2¹ = 138195023387 is a prime.

Together with 138195023387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138195023381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69097511694 + 69097511695.

It is an arithmetic number, because the mean of its divisors is an integer number (69097511695).

Almost surely, 2^138195023389 is an apocalyptic number.

It is an amenable number.

138195023389 is a deficient number, since it is larger than the sum of its proper divisors (1).

138195023389 is an equidigital number, since it uses as much as digits as its factorization.

138195023389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 138195023389 in words is "one hundred thirty-eight billion, one hundred ninety-five million, twenty-three thousand, three hundred eighty-nine".