990453 has 8 divisors (see below), whose sum is σ = 1356448. Its totient is φ = 642384.

The previous prime is 990397. The next prime is 990463. The reversal of 990453 is 354099.

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

It is not a de Polignac number, because 990453 - 2⁶ = 990389 is a prime.

It is an Ulam number.

It is a Duffinian number.

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 990453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990463) 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, 4351 + ... + 4572.

It is an arithmetic number, because the mean of its divisors is an integer number (169556).

2⁹⁹⁰⁴⁵³ is an apocalyptic number.

It is an amenable number.

990453 is a deficient number, since it is larger than the sum of its proper divisors (365995).

990453 is a wasteful number, since it uses less digits than its factorization.

990453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 990453 is about 995.2150521370. The cubic root of 990453 is about 99.6807485363.

The spelling of 990453 in words is "nine hundred ninety thousand, four hundred fifty-three".