9921363943 has 2 divisors, whose sum is σ = 9921363944. Its totient is φ = 9921363942.

The previous prime is 9921363919. The next prime is 9921364003. The reversal of 9921363943 is 3493631299.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9921363943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9921366943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960681971 + 4960681972.

It is an arithmetic number, because the mean of its divisors is an integer number (4960681972).

Almost surely, 2^9921363943 is an apocalyptic number.

9921363943 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921363943 is an equidigital number, since it uses as much as digits as its factorization.

9921363943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 49.

The square root of 9921363943 is about 99606.0437071968. The cubic root of 9921363943 is about 2148.7726142477.

The spelling of 9921363943 in words is "nine billion, nine hundred twenty-one million, three hundred sixty-three thousand, nine hundred forty-three".