394491 has 4 divisors (see below), whose sum is σ = 525992. Its totient is φ = 262992.

The previous prime is 394489. The next prime is 394501. The reversal of 394491 is 194493.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 394491 - 2¹ = 394489 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394411) 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, 65746 + ... + 65751.

It is an arithmetic number, because the mean of its divisors is an integer number (131498).

2³⁹⁴⁴⁹¹ is an apocalyptic number.

394491 is a deficient number, since it is larger than the sum of its proper divisors (131501).

394491 is a wasteful number, since it uses less digits than its factorization.

394491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131500.

The product of its digits is 3888, while the sum is 30.

The square root of 394491 is about 628.0851853053. The cubic root of 394491 is about 73.3408096143.

The spelling of 394491 in words is "three hundred ninety-four thousand, four hundred ninety-one".