393893 has 4 divisors (see below), whose sum is σ = 399840. Its totient is φ = 387948.

The previous prime is 393871. The next prime is 393901. The reversal of 393893 is 398393.

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 393893 - 2⁸ = 393637 is a prime.

It is a super-3 number, since 3×393893³ = 183339500326478871, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 393893.

It is not an unprimeable number, because it can be changed into a prime (393853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873 + ... + 3006.

It is an arithmetic number, because the mean of its divisors is an integer number (99960).

2³⁹³⁸⁹³ is an apocalyptic number.

It is an amenable number.

393893 is a deficient number, since it is larger than the sum of its proper divisors (5947).

393893 is an equidigital number, since it uses as much as digits as its factorization.

393893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5946.

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

The square root of 393893 is about 627.6089546844. The cubic root of 393893 is about 73.3037323139.

The spelling of 393893 in words is "three hundred ninety-three thousand, eight hundred ninety-three".