399393 has 12 divisors (see below), whose sum is σ = 582400. Its totient is φ = 263736.

The previous prime is 399391. The next prime is 399401. The reversal of 399393 is 393993.

It is not a de Polignac number, because 399393 - 2¹ = 399391 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1680 + ... + 1902.

2³⁹⁹³⁹³ is an apocalyptic number.

It is an amenable number.

399393 is a deficient number, since it is larger than the sum of its proper divisors (183007).

399393 is a wasteful number, since it uses less digits than its factorization.

399393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 425 counting only the distinct ones).

The product of its digits is 19683, while the sum is 36.

The square root of 399393 is about 631.9754742077. The cubic root of 399393 is about 73.6433409858.

The spelling of 399393 in words is "three hundred ninety-nine thousand, three hundred ninety-three".