394641317 has 4 divisors (see below), whose sum is σ = 451018656. Its totient is φ = 338263980.

The previous prime is 394641301. The next prime is 394641353. The reversal of 394641317 is 713146493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 713146493 = 617 ⋅1155829.

It is a cyclic number.

It is not a de Polignac number, because 394641317 - 2⁴ = 394641301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394641017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28188659 + ... + 28188672.

It is an arithmetic number, because the mean of its divisors is an integer number (112754664).

Almost surely, 2^394641317 is an apocalyptic number.

It is an amenable number.

394641317 is a deficient number, since it is larger than the sum of its proper divisors (56377339).

394641317 is an equidigital number, since it uses as much as digits as its factorization.

394641317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56377338.

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

The square root of 394641317 is about 19865.5812147543. The cubic root of 394641317 is about 733.5012370130.

The spelling of 394641317 in words is "three hundred ninety-four million, six hundred forty-one thousand, three hundred seventeen".