9290921 has 2 divisors, whose sum is σ = 9290922. Its totient is φ = 9290920.

The previous prime is 9290903. The next prime is 9290923. The reversal of 9290921 is 1290929.

9290921 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., 7639696 + 1651225 = 2764^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 9290921 - 2¹⁰ = 9289897 is a prime.

Together with 9290923, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (9290923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4645460 + 4645461.

It is an arithmetic number, because the mean of its divisors is an integer number (4645461).

Almost surely, 2^9290921 is an apocalyptic number.

It is an amenable number.

9290921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9290921 is an equidigital number, since it uses as much as digits as its factorization.

9290921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9290921 is about 3048.1012122303. The cubic root of 9290921 is about 210.2259171140.

The spelling of 9290921 in words is "nine million, two hundred ninety thousand, nine hundred twenty-one".