404820421979 has 2 divisors, whose sum is σ = 404820421980. Its totient is φ = 404820421978.

The previous prime is 404820421927. The next prime is 404820422011. The reversal of 404820421979 is 979124028404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404820421979 - 2³² = 400525454683 is a prime.

It is not a weakly prime, because it can be changed into another prime (404820481979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202410210989 + 202410210990.

It is an arithmetic number, because the mean of its divisors is an integer number (202410210990).

Almost surely, 2^404820421979 is an apocalyptic number.

404820421979 is a deficient number, since it is larger than the sum of its proper divisors (1).

404820421979 is an equidigital number, since it uses as much as digits as its factorization.

404820421979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 404820421979 in words is "four hundred four billion, eight hundred twenty million, four hundred twenty-one thousand, nine hundred seventy-nine".