393934907 has 2 divisors, whose sum is σ = 393934908. Its totient is φ = 393934906.

The previous prime is 393934867. The next prime is 393934921. The reversal of 393934907 is 709439393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393934907 - 2¹⁴ = 393918523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (393934987) 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, 196967453 + 196967454.

It is an arithmetic number, because the mean of its divisors is an integer number (196967454).

Almost surely, 2^393934907 is an apocalyptic number.

393934907 is a deficient number, since it is larger than the sum of its proper divisors (1).

393934907 is an equidigital number, since it uses as much as digits as its factorization.

393934907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 47.

The square root of 393934907 is about 19847.7935045687. The cubic root of 393934907 is about 733.0633186134.

The spelling of 393934907 in words is "three hundred ninety-three million, nine hundred thirty-four thousand, nine hundred seven".