789221 has 2 divisors, whose sum is σ = 789222. Its totient is φ = 789220.

The previous prime is 789181. The next prime is 789227. The reversal of 789221 is 122987.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 784996 + 4225 = 886^2 + 65^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789221 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (789227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394610 + 394611.

It is an arithmetic number, because the mean of its divisors is an integer number (394611).

2⁷⁸⁹²²¹ is an apocalyptic number.

It is an amenable number.

789221 is a deficient number, since it is larger than the sum of its proper divisors (1).

789221 is an equidigital number, since it uses as much as digits as its factorization.

789221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 789221 is about 888.3811119109. The cubic root of 789221 is about 92.4129592713.

The spelling of 789221 in words is "seven hundred eighty-nine thousand, two hundred twenty-one".