999393 has 4 divisors (see below), whose sum is σ = 1332528. Its totient is φ = 666260.

The previous prime is 999389. The next prime is 999431. The reversal of 999393 is 393999.

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 999393 - 2² = 999389 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (992393) 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, 166563 + ... + 166568.

It is an arithmetic number, because the mean of its divisors is an integer number (333132).

2⁹⁹⁹³⁹³ is an apocalyptic number.

It is an amenable number.

999393 is a deficient number, since it is larger than the sum of its proper divisors (333135).

999393 is a wasteful number, since it uses less digits than its factorization.

999393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333134.

The product of its digits is 59049, while the sum is 42.

The square root of 999393 is about 999.6964539299. The cubic root of 999393 is about 99.9797625714.

The spelling of 999393 in words is "nine hundred ninety-nine thousand, three hundred ninety-three".