404478847 has 2 divisors, whose sum is σ = 404478848. Its totient is φ = 404478846.

The previous prime is 404478797. The next prime is 404478853. The reversal of 404478847 is 748874404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404478847 - 2¹⁵ = 404446079 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 404478797 and 404478806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404478887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202239423 + 202239424.

It is an arithmetic number, because the mean of its divisors is an integer number (202239424).

Almost surely, 2^404478847 is an apocalyptic number.

404478847 is a deficient number, since it is larger than the sum of its proper divisors (1).

404478847 is an equidigital number, since it uses as much as digits as its factorization.

404478847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 802816, while the sum is 46.

The square root of 404478847 is about 20111.6594790186. The cubic root of 404478847 is about 739.5461345186.

It can be divided in two parts, 40447 and 8847, that added together give a palindrome (49294).

The spelling of 404478847 in words is "four hundred four million, four hundred seventy-eight thousand, eight hundred forty-seven".