393604427 has 4 divisors (see below), whose sum is σ = 406301376. Its totient is φ = 380907480.

The previous prime is 393604403. The next prime is 393604429. The reversal of 393604427 is 724406393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 393604427 - 2⁶ = 393604363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (393604429) 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 in 3 ways as a sum of consecutive naturals, for example, 6348428 + ... + 6348489.

It is an arithmetic number, because the mean of its divisors is an integer number (101575344).

Almost surely, 2^393604427 is an apocalyptic number.

393604427 is a deficient number, since it is larger than the sum of its proper divisors (12696949).

393604427 is a wasteful number, since it uses less digits than its factorization.

393604427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696948.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 393604427 is about 19839.4663990743. The cubic root of 393604427 is about 732.8582673564.

The spelling of 393604427 in words is "three hundred ninety-three million, six hundred four thousand, four hundred twenty-seven".