404645317 has 2 divisors, whose sum is σ = 404645318. Its totient is φ = 404645316.

The previous prime is 404645303. The next prime is 404645321. The reversal of 404645317 is 713546404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400040001 + 4605316 = 20001^2 + 2146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404645317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404645327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202322658 + 202322659.

It is an arithmetic number, because the mean of its divisors is an integer number (202322659).

Almost surely, 2^404645317 is an apocalyptic number.

It is an amenable number.

404645317 is a deficient number, since it is larger than the sum of its proper divisors (1).

404645317 is an equidigital number, since it uses as much as digits as its factorization.

404645317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 404645317 is about 20115.7976973323. The cubic root of 404645317 is about 739.6475781088.

The spelling of 404645317 in words is "four hundred four million, six hundred forty-five thousand, three hundred seventeen".