393420439 has 2 divisors, whose sum is σ = 393420440. Its totient is φ = 393420438.

The previous prime is 393420407. The next prime is 393420481. The reversal of 393420439 is 934024393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393420439 - 2⁵ = 393420407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393420398 and 393420407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393420499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196710219 + 196710220.

It is an arithmetic number, because the mean of its divisors is an integer number (196710220).

Almost surely, 2^393420439 is an apocalyptic number.

393420439 is a deficient number, since it is larger than the sum of its proper divisors (1).

393420439 is an equidigital number, since it uses as much as digits as its factorization.

393420439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 393420439 is about 19834.8289380070. The cubic root of 393420439 is about 732.7440595099.

The spelling of 393420439 in words is "three hundred ninety-three million, four hundred twenty thousand, four hundred thirty-nine".