9921622019 has 2 divisors, whose sum is σ = 9921622020. Its totient is φ = 9921622018.

The previous prime is 9921621961. The next prime is 9921622031. The reversal of 9921622019 is 9102261299.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9921622019 - 2⁸ = 9921621763 is a prime.

It is a super-2 number, since 2×9921622019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9921622069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960811009 + 4960811010.

It is an arithmetic number, because the mean of its divisors is an integer number (4960811010).

Almost surely, 2^9921622019 is an apocalyptic number.

9921622019 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921622019 is an equidigital number, since it uses as much as digits as its factorization.

9921622019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 9921622019 is about 99607.3391824117. The cubic root of 9921622019 is about 2148.7912454842.

The spelling of 9921622019 in words is "nine billion, nine hundred twenty-one million, six hundred twenty-two thousand, nineteen".