990459 has 6 divisors (see below), whose sum is σ = 1430676. Its totient is φ = 660300.

The previous prime is 990397. The next prime is 990463. The reversal of 990459 is 954099.

It is not a de Polignac number, because 990459 - 2⁷ = 990331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55017 + ... + 55034.

It is an arithmetic number, because the mean of its divisors is an integer number (238446).

2⁹⁹⁰⁴⁵⁹ is an apocalyptic number.

990459 is a deficient number, since it is larger than the sum of its proper divisors (440217).

990459 is a wasteful number, since it uses less digits than its factorization.

990459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110057 (or 110054 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 990459 is about 995.2180665563. The cubic root of 990459 is about 99.6809498191.

The spelling of 990459 in words is "nine hundred ninety thousand, four hundred fifty-nine".