138147989544373 has 2 divisors, whose sum is σ = 138147989544374. Its totient is φ = 138147989544372.

The previous prime is 138147989544359. The next prime is 138147989544457. The reversal of 138147989544373 is 373445989741831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136382644176804 + 1765345367569 = 11678298^2 + 1328663^2 .

It is a cyclic number.

It is not a de Polignac number, because 138147989544373 - 2¹³ = 138147989536181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138147989544373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138147989544673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69073994772186 + 69073994772187.

It is an arithmetic number, because the mean of its divisors is an integer number (69073994772187).

Almost surely, 2^{138147989544373} is an apocalyptic number.

It is an amenable number.

138147989544373 is a deficient number, since it is larger than the sum of its proper divisors (1).

138147989544373 is an equidigital number, since it uses as much as digits as its factorization.

138147989544373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2194698240, while the sum is 76.

The spelling of 138147989544373 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-nine million, five hundred forty-four thousand, three hundred seventy-three".