968907221 has 2 divisors, whose sum is σ = 968907222. Its totient is φ = 968907220.

The previous prime is 968907193. The next prime is 968907227. The reversal of 968907221 is 122709869.

It is a happy number.

968907221 is digitally balanced in base 2, 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., 863536996 + 105370225 = 29386^2 + 10265^2 .

It is an emirp because it is prime and its reverse (122709869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 968907221 - 2⁶ = 968907157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (968907227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484453610 + 484453611.

It is an arithmetic number, because the mean of its divisors is an integer number (484453611).

Almost surely, 2^968907221 is an apocalyptic number.

It is an amenable number.

968907221 is a deficient number, since it is larger than the sum of its proper divisors (1).

968907221 is an equidigital number, since it uses as much as digits as its factorization.

968907221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 968907221 is about 31127.2745514284. The cubic root of 968907221 is about 989.5264275828.

The spelling of 968907221 in words is "nine hundred sixty-eight million, nine hundred seven thousand, two hundred twenty-one".