138741166393 has 2 divisors, whose sum is σ = 138741166394. Its totient is φ = 138741166392.

The previous prime is 138741166349. The next prime is 138741166423. The reversal of 138741166393 is 393661147831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136376581264 + 2364585129 = 369292^2 + 48627^2 .

It is a cyclic number.

It is not a de Polignac number, because 138741166393 - 2³⁷ = 1302212921 is a prime.

It is a super-2 number, since 2×138741166393² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138741166393.

It is not a weakly prime, because it can be changed into another prime (138741166303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69370583196 + 69370583197.

It is an arithmetic number, because the mean of its divisors is an integer number (69370583197).

Almost surely, 2^138741166393 is an apocalyptic number.

It is an amenable number.

138741166393 is a deficient number, since it is larger than the sum of its proper divisors (1).

138741166393 is an equidigital number, since it uses as much as digits as its factorization.

138741166393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 52.

The spelling of 138741166393 in words is "one hundred thirty-eight billion, seven hundred forty-one million, one hundred sixty-six thousand, three hundred ninety-three".