9921363919 has 2 divisors, whose sum is σ = 9921363920. Its totient is φ = 9921363918.

The previous prime is 9921363901. The next prime is 9921363943. The reversal of 9921363919 is 9193631299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9921363919 - 2¹³ = 9921355727 is a prime.

It is a super-2 number, since 2×9921363919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9921363119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960681959 + 4960681960.

It is an arithmetic number, because the mean of its divisors is an integer number (4960681960).

Almost surely, 2^9921363919 is an apocalyptic number.

9921363919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921363919 is an equidigital number, since it uses as much as digits as its factorization.

9921363919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 52.

The square root of 9921363919 is about 99606.0435867222. The cubic root of 9921363919 is about 2148.7726125151.

The spelling of 9921363919 in words is "nine billion, nine hundred twenty-one million, three hundred sixty-three thousand, nine hundred nineteen".