844933421 has 2 divisors, whose sum is σ = 844933422. Its totient is φ = 844933420.

The previous prime is 844933409. The next prime is 844933469. The reversal of 844933421 is 124339448.

844933421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521437225 + 323496196 = 22835^2 + 17986^2 .

It is a cyclic number.

It is not a de Polignac number, because 844933421 - 2¹⁴ = 844917037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844933121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422466710 + 422466711.

It is an arithmetic number, because the mean of its divisors is an integer number (422466711).

Almost surely, 2^844933421 is an apocalyptic number.

It is an amenable number.

844933421 is a deficient number, since it is larger than the sum of its proper divisors (1).

844933421 is an equidigital number, since it uses as much as digits as its factorization.

844933421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 38.

The square root of 844933421 is about 29067.7384913240. The cubic root of 844933421 is about 945.3823638611.

The spelling of 844933421 in words is "eight hundred forty-four million, nine hundred thirty-three thousand, four hundred twenty-one".