498409 has 2 divisors, whose sum is σ = 498410. Its totient is φ = 498408.

The previous prime is 498403. The next prime is 498439. The reversal of 498409 is 904894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 222784 = 525^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 498409 - 2³ = 498401 is a prime.

498409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (498401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249204 + 249205.

It is an arithmetic number, because the mean of its divisors is an integer number (249205).

2⁴⁹⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

498409 is a deficient number, since it is larger than the sum of its proper divisors (1).

498409 is an equidigital number, since it uses as much as digits as its factorization.

498409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 498409 is about 705.9808779280. The cubic root of 498409 is about 79.2857779787.

The spelling of 498409 in words is "four hundred ninety-eight thousand, four hundred nine".