844285913 has 2 divisors, whose sum is σ = 844285914. Its totient is φ = 844285912.

The previous prime is 844285907. The next prime is 844285969. The reversal of 844285913 is 319582448.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 773507344 + 70778569 = 27812^2 + 8413^2 .

It is a cyclic number.

It is not a de Polignac number, because 844285913 - 2⁸ = 844285657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (844285973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422142956 + 422142957.

It is an arithmetic number, because the mean of its divisors is an integer number (422142957).

Almost surely, 2^844285913 is an apocalyptic number.

It is an amenable number.

844285913 is a deficient number, since it is larger than the sum of its proper divisors (1).

844285913 is an equidigital number, since it uses as much as digits as its factorization.

844285913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 844285913 is about 29056.5984416621. The cubic root of 844285913 is about 945.1408067296.

The spelling of 844285913 in words is "eight hundred forty-four million, two hundred eighty-five thousand, nine hundred thirteen".