9438565021393 has 2 divisors, whose sum is σ = 9438565021394. Its totient is φ = 9438565021392.

The previous prime is 9438565021337. The next prime is 9438565021439. The reversal of 9438565021393 is 3931205658349.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9363067567569 + 75497453824 = 3059913^2 + 274768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9438565021393 is a prime.

It is not a weakly prime, because it can be changed into another prime (9438565021693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4719282510696 + 4719282510697.

It is an arithmetic number, because the mean of its divisors is an integer number (4719282510697).

Almost surely, 2^{9438565021393} is an apocalyptic number.

It is an amenable number.

9438565021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

9438565021393 is an equidigital number, since it uses as much as digits as its factorization.

9438565021393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 9438565021393 in words is "nine trillion, four hundred thirty-eight billion, five hundred sixty-five million, twenty-one thousand, three hundred ninety-three".