999353 has 4 divisors (see below), whose sum is σ = 1005648. Its totient is φ = 993060.

The previous prime is 999331. The next prime is 999359. The reversal of 999353 is 353999.

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, and also an emirpimes, since its reverse is a distinct semiprime: 353999 = 79 ⋅4481.

It is a cyclic number.

It is not a de Polignac number, because 999353 - 2¹⁰ = 998329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999359) 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, 2903 + ... + 3228.

It is an arithmetic number, because the mean of its divisors is an integer number (251412).

2⁹⁹⁹³⁵³ is an apocalyptic number.

It is an amenable number.

999353 is a deficient number, since it is larger than the sum of its proper divisors (6295).

999353 is a wasteful number, since it uses less digits than its factorization.

999353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294.

The product of its digits is 32805, while the sum is 38.

The square root of 999353 is about 999.6764476569. The cubic root of 999353 is about 99.9784286804.

The spelling of 999353 in words is "nine hundred ninety-nine thousand, three hundred fifty-three".