498845509 has 2 divisors, whose sum is σ = 498845510. Its totient is φ = 498845508.

The previous prime is 498845497. The next prime is 498845539. The reversal of 498845509 is 905548894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446688225 + 52157284 = 21135^2 + 7222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498845509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (498845539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249422754 + 249422755.

It is an arithmetic number, because the mean of its divisors is an integer number (249422755).

Almost surely, 2^498845509 is an apocalyptic number.

It is an amenable number.

498845509 is a deficient number, since it is larger than the sum of its proper divisors (1).

498845509 is an equidigital number, since it uses as much as digits as its factorization.

498845509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The square root of 498845509 is about 22334.8496525049. The cubic root of 498845509 is about 793.0891751337.

The spelling of 498845509 in words is "four hundred ninety-eight million, eight hundred forty-five thousand, five hundred nine".