394917 has 4 divisors (see below), whose sum is σ = 526560. Its totient is φ = 263276.

The previous prime is 394897. The next prime is 394931. The reversal of 394917 is 719493.

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: 719493 = 3 ⋅239831.

It is a cyclic number.

It is not a de Polignac number, because 394917 - 2¹² = 390821 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 394917.

It is not an unprimeable number, because it can be changed into a prime (394967) 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, 65817 + ... + 65822.

It is an arithmetic number, because the mean of its divisors is an integer number (131640).

2³⁹⁴⁹¹⁷ is an apocalyptic number.

It is an amenable number.

394917 is a deficient number, since it is larger than the sum of its proper divisors (131643).

394917 is a wasteful number, since it uses less digits than its factorization.

394917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131642.

The product of its digits is 6804, while the sum is 33.

The square root of 394917 is about 628.4242197751. The cubic root of 394917 is about 73.3671996928.

The spelling of 394917 in words is "three hundred ninety-four thousand, nine hundred seventeen".