404066321 has 2 divisors, whose sum is σ = 404066322. Its totient is φ = 404066320.

The previous prime is 404066317. The next prime is 404066363. The reversal of 404066321 is 123660404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390457600 + 13608721 = 19760^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 404066321 - 2² = 404066317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404066371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202033160 + 202033161.

It is an arithmetic number, because the mean of its divisors is an integer number (202033161).

Almost surely, 2^404066321 is an apocalyptic number.

It is an amenable number.

404066321 is a deficient number, since it is larger than the sum of its proper divisors (1).

404066321 is an equidigital number, since it uses as much as digits as its factorization.

404066321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 404066321 is about 20101.4009710766. The cubic root of 404066321 is about 739.2946291663.

The spelling of 404066321 in words is "four hundred four million, sixty-six thousand, three hundred twenty-one".