393428999 has 2 divisors, whose sum is σ = 393429000. Its totient is φ = 393428998.

The previous prime is 393428983. The next prime is 393429013. The reversal of 393428999 is 999824393.

It is a strong prime.

It is an emirp because it is prime and its reverse (999824393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 393428999 - 2⁴ = 393428983 is a prime.

It is a Sophie Germain 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 (393448999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196714499 + 196714500.

It is an arithmetic number, because the mean of its divisors is an integer number (196714500).

Almost surely, 2^393428999 is an apocalyptic number.

393428999 is a deficient number, since it is larger than the sum of its proper divisors (1).

393428999 is an equidigital number, since it uses as much as digits as its factorization.

393428999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 56.

The square root of 393428999 is about 19835.0447188808. The cubic root of 393428999 is about 732.7493737938.

The spelling of 393428999 in words is "three hundred ninety-three million, four hundred twenty-eight thousand, nine hundred ninety-nine".