98781934409 has 2 divisors, whose sum is σ = 98781934410. Its totient is φ = 98781934408.

The previous prime is 98781934397. The next prime is 98781934469. The reversal of 98781934409 is 90443918789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78695958784 + 20085975625 = 280528^2 + 141725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98781934409 is a prime.

It is not a weakly prime, because it can be changed into another prime (98781934469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49390967204 + 49390967205.

It is an arithmetic number, because the mean of its divisors is an integer number (49390967205).

Almost surely, 2^98781934409 is an apocalyptic number.

It is an amenable number.

98781934409 is a deficient number, since it is larger than the sum of its proper divisors (1).

98781934409 is an equidigital number, since it uses as much as digits as its factorization.

98781934409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 98781934409 in words is "ninety-eight billion, seven hundred eighty-one million, nine hundred thirty-four thousand, four hundred nine".