498509 has 4 divisors (see below), whose sum is σ = 543840. Its totient is φ = 453180.

The previous prime is 498497. The next prime is 498521. The reversal of 498509 is 905894.

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 an interprime number because it is at equal distance from previous prime (498497) and next prime (498521).

It is a cyclic number.

It is not a de Polignac number, because 498509 - 2⁴ = 498493 is a prime.

It is a super-2 number, since 2×498509² = 497022446162, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498599) 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, 22649 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (135960).

2⁴⁹⁸⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

498509 is a deficient number, since it is larger than the sum of its proper divisors (45331).

498509 is a wasteful number, since it uses less digits than its factorization.

498509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45330.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 498509 is about 706.0516978239. The cubic root of 498509 is about 79.2910802155.

It can be divided in two parts, 49 and 8509, that added together give a palindrome (8558).

The spelling of 498509 in words is "four hundred ninety-eight thousand, five hundred nine".