394803317 has 2 divisors, whose sum is σ = 394803318. Its totient is φ = 394803316.

The previous prime is 394803287. The next prime is 394803401. The reversal of 394803317 is 713308493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388917841 + 5885476 = 19721^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 394803317 - 2¹² = 394799221 is a prime.

It is a super-2 number, since 2×394803317² = 311739318228404978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394803217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197401658 + 197401659.

It is an arithmetic number, because the mean of its divisors is an integer number (197401659).

Almost surely, 2^394803317 is an apocalyptic number.

It is an amenable number.

394803317 is a deficient number, since it is larger than the sum of its proper divisors (1).

394803317 is an equidigital number, since it uses as much as digits as its factorization.

394803317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 394803317 is about 19869.6582003818. The cubic root of 394803317 is about 733.6015905404.

The spelling of 394803317 in words is "three hundred ninety-four million, eight hundred three thousand, three hundred seventeen".