383999 has 8 divisors (see below), whose sum is σ = 478848. Its totient is φ = 299160.

The previous prime is 383987. The next prime is 384001. The reversal of 383999 is 999383.

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 383999 - 2⁴ = 383983 is a prime.

It is a Duffinian number.

383999 is a modest number, since divided by 999 gives 383 as remainder.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383909) 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, 2417 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (59856).

2³⁸³⁹⁹⁹ is an apocalyptic number.

383999 is a deficient number, since it is larger than the sum of its proper divisors (94849).

383999 is a wasteful number, since it uses less digits than its factorization.

383999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005.

The product of its digits is 52488, while the sum is 41.

The square root of 383999 is about 619.6765285211. The cubic root of 383999 is about 72.6847606188.

The spelling of 383999 in words is "three hundred eighty-three thousand, nine hundred ninety-nine".