990429 has 8 divisors (see below), whose sum is σ = 1440672. Its totient is φ = 600240.

The previous prime is 990397. The next prime is 990463. The reversal of 990429 is 924099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990429 - 2⁵ = 990397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 30013 = 990429 / (9 + 9 + 0 + 4 + 2 + 9).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 990429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990469) 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 7 ways as a sum of consecutive naturals, for example, 14974 + ... + 15039.

It is an arithmetic number, because the mean of its divisors is an integer number (180084).

2⁹⁹⁰⁴²⁹ is an apocalyptic number.

It is an amenable number.

990429 is a deficient number, since it is larger than the sum of its proper divisors (450243).

990429 is a wasteful number, since it uses less digits than its factorization.

990429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30027.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 990429 is about 995.2029943685. The cubic root of 990429 is about 99.6799433972.

The spelling of 990429 in words is "nine hundred ninety thousand, four hundred twenty-nine".