394091 has 4 divisors (see below), whose sum is σ = 395352. Its totient is φ = 392832.

The previous prime is 394073. The next prime is 394099. The reversal of 394091 is 190493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 190493 = 71 ⋅2683.

It is a cyclic number.

It is not a de Polignac number, because 394091 - 2¹⁸ = 131947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394091.

It is not an unprimeable number, because it can be changed into a prime (394099) 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, 236 + ... + 918.

It is an arithmetic number, because the mean of its divisors is an integer number (98838).

2³⁹⁴⁰⁹¹ is an apocalyptic number.

394091 is a deficient number, since it is larger than the sum of its proper divisors (1261).

394091 is an equidigital number, since it uses as much as digits as its factorization.

394091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 394091 is about 627.7666764014. The cubic root of 394091 is about 73.3160128975.

The spelling of 394091 in words is "three hundred ninety-four thousand, ninety-one".