393859 has 2 divisors, whose sum is σ = 393860. Its totient is φ = 393858.

The previous prime is 393857. The next prime is 393863. The reversal of 393859 is 958393.

It is a weak prime.

It is an emirp because it is prime and its reverse (958393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 393859 - 2¹ = 393857 is a prime.

Together with 393857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (393853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196929 + 196930.

It is an arithmetic number, because the mean of its divisors is an integer number (196930).

2³⁹³⁸⁵⁹ is an apocalyptic number.

393859 is a deficient number, since it is larger than the sum of its proper divisors (1).

393859 is an equidigital number, since it uses as much as digits as its factorization.

393859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 393859 is about 627.5818671695. The cubic root of 393859 is about 73.3016231129.

The spelling of 393859 in words is "three hundred ninety-three thousand, eight hundred fifty-nine".