394329407 has 2 divisors, whose sum is σ = 394329408. Its totient is φ = 394329406.

The previous prime is 394329361. The next prime is 394329421. The reversal of 394329407 is 704923493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394329407 - 2⁶ = 394329343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394329427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197164703 + 197164704.

It is an arithmetic number, because the mean of its divisors is an integer number (197164704).

Almost surely, 2^394329407 is an apocalyptic number.

394329407 is a deficient number, since it is larger than the sum of its proper divisors (1).

394329407 is an equidigital number, since it uses as much as digits as its factorization.

394329407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 394329407 is about 19857.7291501319. The cubic root of 394329407 is about 733.3079419354.

The spelling of 394329407 in words is "three hundred ninety-four million, three hundred twenty-nine thousand, four hundred seven".