393388423 has 4 divisors (see below), whose sum is σ = 399259960. Its totient is φ = 387516888.

The previous prime is 393388417. The next prime is 393388453. The reversal of 393388423 is 324883393.

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 393388423 - 2¹³ = 393380231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 393388423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393388453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2935668 + ... + 2935801.

It is an arithmetic number, because the mean of its divisors is an integer number (99814990).

Almost surely, 2^393388423 is an apocalyptic number.

393388423 is a deficient number, since it is larger than the sum of its proper divisors (5871537).

393388423 is an equidigital number, since it uses as much as digits as its factorization.

393388423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871536.

The product of its digits is 373248, while the sum is 43.

The square root of 393388423 is about 19834.0218563961. The cubic root of 393388423 is about 732.7241824116.

The spelling of 393388423 in words is "three hundred ninety-three million, three hundred eighty-eight thousand, four hundred twenty-three".