98940459509 has 2 divisors, whose sum is σ = 98940459510. Its totient is φ = 98940459508.

The previous prime is 98940459503. The next prime is 98940459523. The reversal of 98940459509 is 90595404989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78692592484 + 20247867025 = 280522^2 + 142295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98940459509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98940459503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49470229754 + 49470229755.

It is an arithmetic number, because the mean of its divisors is an integer number (49470229755).

Almost surely, 2^98940459509 is an apocalyptic number.

It is an amenable number.

98940459509 is a deficient number, since it is larger than the sum of its proper divisors (1).

98940459509 is an equidigital number, since it uses as much as digits as its factorization.

98940459509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20995200, while the sum is 62.

The spelling of 98940459509 in words is "ninety-eight billion, nine hundred forty million, four hundred fifty-nine thousand, five hundred nine".