404847643 has 2 divisors, whose sum is σ = 404847644. Its totient is φ = 404847642.

The previous prime is 404847637. The next prime is 404847719. The reversal of 404847643 is 346748404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404847643 is a prime.

It is a super-2 number, since 2×404847643² = 327803228085310898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 404847596 and 404847605.

It is not a weakly prime, because it can be changed into another prime (404847043) 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, 202423821 + 202423822.

It is an arithmetic number, because the mean of its divisors is an integer number (202423822).

Almost surely, 2^404847643 is an apocalyptic number.

404847643 is a deficient number, since it is larger than the sum of its proper divisors (1).

404847643 is an equidigital number, since it uses as much as digits as its factorization.

404847643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 40.

The square root of 404847643 is about 20120.8261013309. The cubic root of 404847643 is about 739.7708342004.

The spelling of 404847643 in words is "four hundred four million, eight hundred forty-seven thousand, six hundred forty-three".