394489 has 2 divisors, whose sum is σ = 394490. Its totient is φ = 394488.

The previous prime is 394481. The next prime is 394501. The reversal of 394489 is 984493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218089 + 176400 = 467^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 394489 - 2³ = 394481 is a prime.

It is a super-2 number, since 2×394489² = 311243142242, which contains 22 as substring.

It is a Chen prime.

394489 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (394481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197244 + 197245.

It is an arithmetic number, because the mean of its divisors is an integer number (197245).

2³⁹⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

394489 is a deficient number, since it is larger than the sum of its proper divisors (1).

394489 is an equidigital number, since it uses as much as digits as its factorization.

394489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 394489 is about 628.0835931626. The cubic root of 394489 is about 73.3406856724.

The spelling of 394489 in words is "three hundred ninety-four thousand, four hundred eighty-nine".