393900329 has 2 divisors, whose sum is σ = 393900330. Its totient is φ = 393900328.

The previous prime is 393900317. The next prime is 393900337. The reversal of 393900329 is 923009393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265690000 + 128210329 = 16300^2 + 11323^2 .

It is a cyclic number.

It is not a de Polignac number, because 393900329 - 2⁴ = 393900313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393900292 and 393900301.

It is not a weakly prime, because it can be changed into another prime (393900349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196950164 + 196950165.

It is an arithmetic number, because the mean of its divisors is an integer number (196950165).

Almost surely, 2^393900329 is an apocalyptic number.

It is an amenable number.

393900329 is a deficient number, since it is larger than the sum of its proper divisors (1).

393900329 is an equidigital number, since it uses as much as digits as its factorization.

393900329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 38.

The square root of 393900329 is about 19846.9224062573. The cubic root of 393900329 is about 733.0418695494.

The spelling of 393900329 in words is "three hundred ninety-three million, nine hundred thousand, three hundred twenty-nine".