1938743065 has 12 divisors (see below), whose sum is σ = 2706327396. Its totient is φ = 1329423648.

The previous prime is 1938743063. The next prime is 1938743077. The reversal of 1938743065 is 5603478391.

It can be written as a sum of positive squares in 2 ways, for example, as 1435727881 + 503015184 = 37891^2 + 22428^2 .

It is not a de Polignac number, because 1938743065 - 2¹ = 1938743063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938743063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3956374 + ... + 3956863.

It is an arithmetic number, because the mean of its divisors is an integer number (225527283).

Almost surely, 2^1938743065 is an apocalyptic number.

It is an amenable number.

1938743065 is a deficient number, since it is larger than the sum of its proper divisors (767584331).

1938743065 is an equidigital number, since it uses as much as digits as its factorization.

1938743065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913256 (or 7913249 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1938743065 is about 44031.1601595961. The cubic root of 1938743065 is about 1246.9242920905.

The spelling of 1938743065 in words is "one billion, nine hundred thirty-eight million, seven hundred forty-three thousand, sixty-five".