9099386921 has 2 divisors, whose sum is σ = 9099386922. Its totient is φ = 9099386920.

The previous prime is 9099386903. The next prime is 9099386929. The reversal of 9099386921 is 1296839909.

9099386921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9075229696 + 24157225 = 95264^2 + 4915^2 .

It is an emirp because it is prime and its reverse (1296839909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9099386921 - 2¹⁴ = 9099370537 is a prime.

It is not a weakly prime, because it can be changed into another prime (9099386929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4549693460 + 4549693461.

It is an arithmetic number, because the mean of its divisors is an integer number (4549693461).

Almost surely, 2^9099386921 is an apocalyptic number.

It is an amenable number.

9099386921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9099386921 is an equidigital number, since it uses as much as digits as its factorization.

9099386921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 9099386921 is about 95390.7066804728. The cubic root of 9099386921 is about 2087.7125925741.

The spelling of 9099386921 in words is "nine billion, ninety-nine million, three hundred eighty-six thousand, nine hundred twenty-one".