398843441 has 2 divisors, whose sum is σ = 398843442. Its totient is φ = 398843440.

The previous prime is 398843411. The next prime is 398843453. The reversal of 398843441 is 144348893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389233441 + 9610000 = 19729^2 + 3100^2 .

It is a cyclic number.

It is not a de Polignac number, because 398843441 - 2¹⁰ = 398842417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398843392 and 398843401.

It is not a weakly prime, because it can be changed into another prime (398843411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199421720 + 199421721.

It is an arithmetic number, because the mean of its divisors is an integer number (199421721).

Almost surely, 2^398843441 is an apocalyptic number.

It is an amenable number.

398843441 is a deficient number, since it is larger than the sum of its proper divisors (1).

398843441 is an equidigital number, since it uses as much as digits as its factorization.

398843441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 44.

The square root of 398843441 is about 19971.0650942808. The cubic root of 398843441 is about 736.0954809030.

The spelling of 398843441 in words is "three hundred ninety-eight million, eight hundred forty-three thousand, four hundred forty-one".