7844401 has 2 divisors, whose sum is σ = 7844402. Its totient is φ = 7844400.

The previous prime is 7844393. The next prime is 7844423. The reversal of 7844401 is 1044487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7834401 + 10000 = 2799^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 7844401 - 2³ = 7844393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7844401.

It is not a weakly prime, because it can be changed into another prime (7844101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3922200 + 3922201.

It is an arithmetic number, because the mean of its divisors is an integer number (3922201).

Almost surely, 2^7844401 is an apocalyptic number.

It is an amenable number.

7844401 is a deficient number, since it is larger than the sum of its proper divisors (1).

7844401 is an equidigital number, since it uses as much as digits as its factorization.

7844401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 7844401 is about 2800.7857825974. The cubic root of 7844401 is about 198.6948430200.

Adding to 7844401 its reverse (1044487), we get a palindrome (8888888).

The spelling of 7844401 in words is "seven million, eight hundred forty-four thousand, four hundred one".