999493 has 4 divisors (see below), whose sum is σ = 1090368. Its totient is φ = 908620.

The previous prime is 999491. The next prime is 999499. The reversal of 999493 is 394999.

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 999493 - 2¹ = 999491 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 (999491) 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, 45421 + ... + 45442.

It is an arithmetic number, because the mean of its divisors is an integer number (272592).

2⁹⁹⁹⁴⁹³ is an apocalyptic number.

It is an amenable number.

999493 is a deficient number, since it is larger than the sum of its proper divisors (90875).

999493 is a wasteful number, since it uses less digits than its factorization.

999493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90874.

The product of its digits is 78732, while the sum is 43.

The square root of 999493 is about 999.7464678607. The cubic root of 999493 is about 99.9830971431.

The spelling of 999493 in words is "nine hundred ninety-nine thousand, four hundred ninety-three".