384791993 has 8 divisors (see below), whose sum is σ = 394121376. Its totient is φ = 375480000.

The previous prime is 384791989. The next prime is 384791999. The reversal of 384791993 is 399197483.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 384791993 - 2² = 384791989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (384791999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47918 + ... + 55368.

It is an arithmetic number, because the mean of its divisors is an integer number (49265172).

Almost surely, 2^384791993 is an apocalyptic number.

It is an amenable number.

384791993 is a deficient number, since it is larger than the sum of its proper divisors (9329383).

384791993 is a wasteful number, since it uses less digits than its factorization.

384791993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8695.

The product of its digits is 1469664, while the sum is 53.

The square root of 384791993 is about 19616.1156450506. The cubic root of 384791993 is about 727.3475977291.

The spelling of 384791993 in words is "three hundred eighty-four million, seven hundred ninety-one thousand, nine hundred ninety-three".