1938260897149 has 2 divisors, whose sum is σ = 1938260897150. Its totient is φ = 1938260897148.

The previous prime is 1938260897117. The next prime is 1938260897267. The reversal of 1938260897149 is 9417980628391.

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., 1715623193124 + 222637704025 = 1309818^2 + 471845^2 .

It is an emirp because it is prime and its reverse (9417980628391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1938260897149 - 2⁵ = 1938260897117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938260897849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969130448574 + 969130448575.

It is an arithmetic number, because the mean of its divisors is an integer number (969130448575).

Almost surely, 2^{1938260897149} is an apocalyptic number.

It is an amenable number.

1938260897149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938260897149 is an equidigital number, since it uses as much as digits as its factorization.

1938260897149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 1938260897149 in words is "one trillion, nine hundred thirty-eight billion, two hundred sixty million, eight hundred ninety-seven thousand, one hundred forty-nine".