404812321 has 2 divisors, whose sum is σ = 404812322. Its totient is φ = 404812320.

The previous prime is 404812283. The next prime is 404812333. The reversal of 404812321 is 123218404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404452321 + 360000 = 20111^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 404812321 - 2⁷ = 404812193 is a prime.

It is not a weakly prime, because it can be changed into another prime (404812391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202406160 + 202406161.

It is an arithmetic number, because the mean of its divisors is an integer number (202406161).

Almost surely, 2^404812321 is an apocalyptic number.

It is an amenable number.

404812321 is a deficient number, since it is larger than the sum of its proper divisors (1).

404812321 is an equidigital number, since it uses as much as digits as its factorization.

404812321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 404812321 is about 20119.9483349237. The cubic root of 404812321 is about 739.7493191557.

It can be divided in two parts, 4048123 and 21, that added together give a square (4048144 = 2012²).

The spelling of 404812321 in words is "four hundred four million, eight hundred twelve thousand, three hundred twenty-one".