1938195563 has 2 divisors, whose sum is σ = 1938195564. Its totient is φ = 1938195562.

The previous prime is 1938195557. The next prime is 1938195577. The reversal of 1938195563 is 3655918391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1938195563 - 2¹² = 1938191467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1938195593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969097781 + 969097782.

It is an arithmetic number, because the mean of its divisors is an integer number (969097782).

Almost surely, 2^1938195563 is an apocalyptic number.

1938195563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938195563 is an equidigital number, since it uses as much as digits as its factorization.

1938195563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 50.

The square root of 1938195563 is about 44024.9425099000. The cubic root of 1938195563 is about 1246.8069036941.

The spelling of 1938195563 in words is "one billion, nine hundred thirty-eight million, one hundred ninety-five thousand, five hundred sixty-three".