394089 has 4 divisors (see below), whose sum is σ = 525456. Its totient is φ = 262724.

The previous prime is 394073. The next prime is 394099. The reversal of 394089 is 980493.

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: 980493 = 3 ⋅326831.

It is a cyclic number.

It is not a de Polignac number, because 394089 - 2⁴ = 394073 is a prime.

It is a super-2 number, since 2×394089² = 310612279842, which contains 22 as substring.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 394089.

It is not an unprimeable number, because it can be changed into a prime (394019) 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, 65679 + ... + 65684.

It is an arithmetic number, because the mean of its divisors is an integer number (131364).

2³⁹⁴⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

394089 is a deficient number, since it is larger than the sum of its proper divisors (131367).

394089 is a wasteful number, since it uses less digits than its factorization.

394089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131366.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 394089 is about 627.7650834508. The cubic root of 394089 is about 73.3158888718.

The spelling of 394089 in words is "three hundred ninety-four thousand, eighty-nine".