393024421 has 4 divisors (see below), whose sum is σ = 393247372. Its totient is φ = 392801472.

The previous prime is 393024407. The next prime is 393024427. The reversal of 393024421 is 124420393.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63202500 + 329821921 = 7950^2 + 18161^2 .

It is a cyclic number.

It is not a de Polignac number, because 393024421 - 2¹¹ = 393022373 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 393024421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393024427) 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, 108810 + ... + 112363.

It is an arithmetic number, because the mean of its divisors is an integer number (98311843).

Almost surely, 2^393024421 is an apocalyptic number.

It is an amenable number.

393024421 is a deficient number, since it is larger than the sum of its proper divisors (222951).

393024421 is a wasteful number, since it uses less digits than its factorization.

393024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222950.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 393024421 is about 19824.8435302779. The cubic root of 393024421 is about 732.4981163001.

The spelling of 393024421 in words is "three hundred ninety-three million, twenty-four thousand, four hundred twenty-one".