399383 has 4 divisors (see below), whose sum is σ = 404928. Its totient is φ = 393840.

The previous prime is 399379. The next prime is 399389. The reversal of 399383 is 383993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383993 = 151 ⋅2543.

It is a cyclic number.

It is not a de Polignac number, because 399383 - 2² = 399379 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399389) 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, 2663 + ... + 2808.

It is an arithmetic number, because the mean of its divisors is an integer number (101232).

2³⁹⁹³⁸³ is an apocalyptic number.

399383 is a deficient number, since it is larger than the sum of its proper divisors (5545).

399383 is an equidigital number, since it uses as much as digits as its factorization.

399383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544.

The product of its digits is 17496, while the sum is 35.

The square root of 399383 is about 631.9675624587. The cubic root of 399383 is about 73.6427263534.

The spelling of 399383 in words is "three hundred ninety-nine thousand, three hundred eighty-three".