394333729 has 2 divisors, whose sum is σ = 394333730. Its totient is φ = 394333728.

The previous prime is 394333721. The next prime is 394333741. The reversal of 394333729 is 927333493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393943104 + 390625 = 19848^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 394333729 - 2³ = 394333721 is a prime.

It is not a weakly prime, because it can be changed into another prime (394333721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197166864 + 197166865.

It is an arithmetic number, because the mean of its divisors is an integer number (197166865).

Almost surely, 2^394333729 is an apocalyptic number.

It is an amenable number.

394333729 is a deficient number, since it is larger than the sum of its proper divisors (1).

394333729 is an equidigital number, since it uses as much as digits as its factorization.

394333729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 43.

The square root of 394333729 is about 19857.8379739588. The cubic root of 394333729 is about 733.3106210367.

The spelling of 394333729 in words is "three hundred ninety-four million, three hundred thirty-three thousand, seven hundred twenty-nine".