990229 has 4 divisors (see below), whose sum is σ = 997920. Its totient is φ = 982540.

The previous prime is 990211. The next prime is 990239. The reversal of 990229 is 922099.

990229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-990229 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990239) 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, 3649 + ... + 3910.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

2⁹⁹⁰²²⁹ is an apocalyptic number.

It is an amenable number.

990229 is a deficient number, since it is larger than the sum of its proper divisors (7691).

990229 is a wasteful number, since it uses less digits than its factorization.

990229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 990229 is about 995.1025072825. The cubic root of 990229 is about 99.6732333989.

It can be divided in two parts, 99022 and 9, that multiplied together give a palindrome (891198).

The spelling of 990229 in words is "nine hundred ninety thousand, two hundred twenty-nine".