1938836533 has 2 divisors, whose sum is σ = 1938836534. Its totient is φ = 1938836532.

The previous prime is 1938836509. The next prime is 1938836539. The reversal of 1938836533 is 3356388391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1588660164 + 350176369 = 39858^2 + 18713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1938836533 - 2⁹ = 1938836021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938836539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969418266 + 969418267.

It is an arithmetic number, because the mean of its divisors is an integer number (969418267).

Almost surely, 2^1938836533 is an apocalyptic number.

It is an amenable number.

1938836533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938836533 is an equidigital number, since it uses as much as digits as its factorization.

1938836533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The square root of 1938836533 is about 44032.2215315103. The cubic root of 1938836533 is about 1246.9443300985.

The spelling of 1938836533 in words is "one billion, nine hundred thirty-eight million, eight hundred thirty-six thousand, five hundred thirty-three".