98436490091 has 2 divisors, whose sum is σ = 98436490092. Its totient is φ = 98436490090.

The previous prime is 98436490069. The next prime is 98436490109. The reversal of 98436490091 is 19009463489.

Together with next prime (98436490109) 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-98436490091 is a prime.

It is not a weakly prime, because it can be changed into another prime (98436490391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49218245045 + 49218245046.

It is an arithmetic number, because the mean of its divisors is an integer number (49218245046).

Almost surely, 2^98436490091 is an apocalyptic number.

98436490091 is a deficient number, since it is larger than the sum of its proper divisors (1).

98436490091 is an equidigital number, since it uses as much as digits as its factorization.

98436490091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 98436490091 in words is "ninety-eight billion, four hundred thirty-six million, four hundred ninety thousand, ninety-one".