498985979 has 2 divisors, whose sum is σ = 498985980. Its totient is φ = 498985978.

The previous prime is 498985913. The next prime is 498985997. The reversal of 498985979 is 979589894.

Together with next prime (498985997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498985979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (498985079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249492989 + 249492990.

It is an arithmetic number, because the mean of its divisors is an integer number (249492990).

Almost surely, 2^498985979 is an apocalyptic number.

498985979 is a deficient number, since it is larger than the sum of its proper divisors (1).

498985979 is an equidigital number, since it uses as much as digits as its factorization.

498985979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 68.

The square root of 498985979 is about 22337.9940684028. The cubic root of 498985979 is about 793.1636101904.

The spelling of 498985979 in words is "four hundred ninety-eight million, nine hundred eighty-five thousand, nine hundred seventy-nine".