383993393 has 4 divisors (see below), whose sum is σ = 438849600. Its totient is φ = 329137188.

The previous prime is 383993381. The next prime is 383993411. The reversal of 383993393 is 393399383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 383993393 - 2⁶ = 383993329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (383993333) 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, 27428093 + ... + 27428106.

It is an arithmetic number, because the mean of its divisors is an integer number (109712400).

Almost surely, 2^383993393 is an apocalyptic number.

It is an amenable number.

383993393 is a deficient number, since it is larger than the sum of its proper divisors (54856207).

383993393 is an equidigital number, since it uses as much as digits as its factorization.

383993393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54856206.

The product of its digits is 1417176, while the sum is 50.

The square root of 383993393 is about 19595.7493605118. The cubic root of 383993393 is about 726.8440684576.

The spelling of 383993393 in words is "three hundred eighty-three million, nine hundred ninety-three thousand, three hundred ninety-three".