998508659 has 2 divisors, whose sum is σ = 998508660. Its totient is φ = 998508658.

The previous prime is 998508649. The next prime is 998508703. The reversal of 998508659 is 956805899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998508659 - 2⁸ = 998508403 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998508598 and 998508607.

It is not a weakly prime, because it can be changed into another prime (998508649) 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 as a sum of consecutive naturals, namely, 499254329 + 499254330.

It is an arithmetic number, because the mean of its divisors is an integer number (499254330).

Almost surely, 2^998508659 is an apocalyptic number.

998508659 is a deficient number, since it is larger than the sum of its proper divisors (1).

998508659 is an equidigital number, since it uses as much as digits as its factorization.

998508659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The square root of 998508659 is about 31599.1876319629. The cubic root of 998508659 is about 999.5026390064.

The spelling of 998508659 in words is "nine hundred ninety-eight million, five hundred eight thousand, six hundred fifty-nine".