394043417 has 4 divisors (see below), whose sum is σ = 394095156. Its totient is φ = 393991680.

The previous prime is 394043411. The next prime is 394043471. The reversal of 394043417 is 714340493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 714340493 = 17 ⋅42020029.

It can be written as a sum of positive squares in 2 ways, for example, as 357815056 + 36228361 = 18916^2 + 6019^2 .

It is a cyclic number.

It is not a de Polignac number, because 394043417 - 2⁴ = 394043401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394043411) 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, 11948 + ... + 30509.

It is an arithmetic number, because the mean of its divisors is an integer number (98523789).

Almost surely, 2^394043417 is an apocalyptic number.

It is an amenable number.

394043417 is a deficient number, since it is larger than the sum of its proper divisors (51739).

394043417 is an equidigital number, since it uses as much as digits as its factorization.

394043417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51738.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 394043417 is about 19850.5268695821. The cubic root of 394043417 is about 733.1306202554.

The spelling of 394043417 in words is "three hundred ninety-four million, forty-three thousand, four hundred seventeen".