394113389 has 2 divisors, whose sum is σ = 394113390. Its totient is φ = 394113388.

The previous prime is 394113373. The next prime is 394113407. The reversal of 394113389 is 983311493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359102500 + 35010889 = 18950^2 + 5917^2 .

It is a cyclic number.

It is not a de Polignac number, because 394113389 - 2⁴ = 394113373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394113319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197056694 + 197056695.

It is an arithmetic number, because the mean of its divisors is an integer number (197056695).

Almost surely, 2^394113389 is an apocalyptic number.

It is an amenable number.

394113389 is a deficient number, since it is larger than the sum of its proper divisors (1).

394113389 is an equidigital number, since it uses as much as digits as its factorization.

394113389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 394113389 is about 19852.2892634578. The cubic root of 394113389 is about 733.1740127492.

The spelling of 394113389 in words is "three hundred ninety-four million, one hundred thirteen thousand, three hundred eighty-nine".