138890382361 has 2 divisors, whose sum is σ = 138890382362. Its totient is φ = 138890382360.

The previous prime is 138890382331. The next prime is 138890382523. The reversal of 138890382361 is 163283098831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128769016336 + 10121366025 = 358844^2 + 100605^2 .

It is a cyclic number.

It is not a de Polignac number, because 138890382361 - 2²¹ = 138888285209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138890382299 and 138890382308.

It is not a weakly prime, because it can be changed into another prime (138890382311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69445191180 + 69445191181.

It is an arithmetic number, because the mean of its divisors is an integer number (69445191181).

Almost surely, 2^138890382361 is an apocalyptic number.

It is an amenable number.

138890382361 is a deficient number, since it is larger than the sum of its proper divisors (1).

138890382361 is an equidigital number, since it uses as much as digits as its factorization.

138890382361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 138890382361 in words is "one hundred thirty-eight billion, eight hundred ninety million, three hundred eighty-two thousand, three hundred sixty-one".