498984809 has 2 divisors, whose sum is σ = 498984810. Its totient is φ = 498984808.

The previous prime is 498984721. The next prime is 498984847. The reversal of 498984809 is 908489894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322094809 + 176890000 = 17947^2 + 13300^2 .

It is a cyclic number.

It is not a de Polignac number, because 498984809 - 2¹⁶ = 498919273 is a prime.

It is a super-2 number, since 2×498984809² = 497971679225532962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (498984869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249492404 + 249492405.

It is an arithmetic number, because the mean of its divisors is an integer number (249492405).

Almost surely, 2^498984809 is an apocalyptic number.

It is an amenable number.

498984809 is a deficient number, since it is larger than the sum of its proper divisors (1).

498984809 is an equidigital number, since it uses as much as digits as its factorization.

498984809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 498984809 is about 22337.9678798229. The cubic root of 498984809 is about 793.1629902651.

It can be divided in two parts, 4989 and 84809, that added together give a palindrome (89798).

The spelling of 498984809 in words is "four hundred ninety-eight million, nine hundred eighty-four thousand, eight hundred nine".