393493 has 4 divisors (see below), whose sum is σ = 402688. Its totient is φ = 384300.

The previous prime is 393487. The next prime is 393517. The reversal of 393493 is 394393.

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 393493 - 2⁹ = 392981 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393403) 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, 4533 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (100672).

2³⁹³⁴⁹³ is an apocalyptic number.

It is an amenable number.

393493 is a deficient number, since it is larger than the sum of its proper divisors (9195).

393493 is an equidigital number, since it uses as much as digits as its factorization.

393493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9194.

The product of its digits is 8748, while the sum is 31.

The square root of 393493 is about 627.2902039726. The cubic root of 393493 is about 73.2789104935.

Subtracting 393493 from its reverse (394393), we obtain a square (900 = 30²).

The spelling of 393493 in words is "three hundred ninety-three thousand, four hundred ninety-three".