9850921 has 2 divisors, whose sum is σ = 9850922. Its totient is φ = 9850920.

The previous prime is 9850889. The next prime is 9850931. The reversal of 9850921 is 1290589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 1527696 = 2885^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 9850921 - 2⁵ = 9850889 is a prime.

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

9850921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9850931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4925460 + 4925461.

It is an arithmetic number, because the mean of its divisors is an integer number (4925461).

Almost surely, 2^9850921 is an apocalyptic number.

It is an amenable number.

9850921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9850921 is an equidigital number, since it uses as much as digits as its factorization.

9850921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 9850921 is about 3138.6176893658. The cubic root of 9850921 is about 214.3675011189.

The spelling of 9850921 in words is "nine million, eight hundred fifty thousand, nine hundred twenty-one".