138982361890693 has 2 divisors, whose sum is σ = 138982361890694. Its totient is φ = 138982361890692.

The previous prime is 138982361890643. The next prime is 138982361890709. The reversal of 138982361890693 is 396098163289831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72962723079684 + 66019638811009 = 8541822^2 + 8125247^2 .

It is a cyclic number.

It is not a de Polignac number, because 138982361890693 - 2²⁹ = 138981825019781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138982361890643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69491180945346 + 69491180945347.

It is an arithmetic number, because the mean of its divisors is an integer number (69491180945347).

Almost surely, 2^{138982361890693} is an apocalyptic number.

It is an amenable number.

138982361890693 is a deficient number, since it is larger than the sum of its proper divisors (1).

138982361890693 is an equidigital number, since it uses as much as digits as its factorization.

138982361890693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725594112, while the sum is 76.

The spelling of 138982361890693 in words is "one hundred thirty-eight trillion, nine hundred eighty-two billion, three hundred sixty-one million, eight hundred ninety thousand, six hundred ninety-three".