404604217 has 2 divisors, whose sum is σ = 404604218. Its totient is φ = 404604216.

The previous prime is 404604191. The next prime is 404604257. The reversal of 404604217 is 712406404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399240361 + 5363856 = 19981^2 + 2316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404604217 is a prime.

It is not a weakly prime, because it can be changed into another prime (404604257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202302108 + 202302109.

It is an arithmetic number, because the mean of its divisors is an integer number (202302109).

Almost surely, 2^404604217 is an apocalyptic number.

It is an amenable number.

404604217 is a deficient number, since it is larger than the sum of its proper divisors (1).

404604217 is an equidigital number, since it uses as much as digits as its factorization.

404604217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 404604217 is about 20114.7760862506. The cubic root of 404604217 is about 739.6225351527.

The spelling of 404604217 in words is "four hundred four million, six hundred four thousand, two hundred seventeen".