999299 has 4 divisors (see below), whose sum is σ = 1142064. Its totient is φ = 856536.

The previous prime is 999287. The next prime is 999307. The reversal of 999299 is 992999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999299 - 2⁸ = 999043 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (999239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71372 + ... + 71385.

It is an arithmetic number, because the mean of its divisors is an integer number (285516).

2⁹⁹⁹²⁹⁹ is an apocalyptic number.

999299 is a deficient number, since it is larger than the sum of its proper divisors (142765).

999299 is a wasteful number, since it uses less digits than its factorization.

999299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142764.

The product of its digits is 118098, while the sum is 47.

The square root of 999299 is about 999.6494385533. The cubic root of 999299 is about 99.9766278712.

The spelling of 999299 in words is "nine hundred ninety-nine thousand, two hundred ninety-nine".