498909 has 4 divisors (see below), whose sum is σ = 665216. Its totient is φ = 332604.

The previous prime is 498907. The next prime is 498923. The reversal of 498909 is 909894.

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 not a de Polignac number, because 498909 - 2¹ = 498907 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498907) 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, 83149 + ... + 83154.

It is an arithmetic number, because the mean of its divisors is an integer number (166304).

2⁴⁹⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

498909 is a deficient number, since it is larger than the sum of its proper divisors (166307).

498909 is a wasteful number, since it uses less digits than its factorization.

498909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166306.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 498909 is about 706.3349064006. The cubic root of 498909 is about 79.3122820747.

The spelling of 498909 in words is "four hundred ninety-eight thousand, nine hundred nine".