393204239 has 2 divisors, whose sum is σ = 393204240. Its totient is φ = 393204238.

The previous prime is 393204223. The next prime is 393204241. The reversal of 393204239 is 932402393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393204239 - 2⁴ = 393204223 is a prime.

Together with 393204241, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_20993057 and since 393204239 and 20993057 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 393204199 and 393204208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393204739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196602119 + 196602120.

It is an arithmetic number, because the mean of its divisors is an integer number (196602120).

Almost surely, 2^393204239 is an apocalyptic number.

393204239 is a deficient number, since it is larger than the sum of its proper divisors (1).

393204239 is an equidigital number, since it uses as much as digits as its factorization.

393204239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 393204239 is about 19829.3781798623. The cubic root of 393204239 is about 732.6098110249.

The spelling of 393204239 in words is "three hundred ninety-three million, two hundred four thousand, two hundred thirty-nine".