98988640897 has 2 divisors, whose sum is σ = 98988640898. Its totient is φ = 98988640896.

The previous prime is 98988640879. The next prime is 98988640957. The reversal of 98988640897 is 79804688989.

Together with previous prime (98988640879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79191025281 + 19797615616 = 281409^2 + 140704^2 .

It is a cyclic number.

It is not a de Polignac number, because 98988640897 - 2²³ = 98980252289 is a prime.

It is not a weakly prime, because it can be changed into another prime (98988640297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49494320448 + 49494320449.

It is an arithmetic number, because the mean of its divisors is an integer number (49494320449).

Almost surely, 2^98988640897 is an apocalyptic number.

It is an amenable number.

98988640897 is a deficient number, since it is larger than the sum of its proper divisors (1).

98988640897 is an equidigital number, since it uses as much as digits as its factorization.

98988640897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 501645312, while the sum is 76.

The spelling of 98988640897 in words is "ninety-eight billion, nine hundred eighty-eight million, six hundred forty thousand, eight hundred ninety-seven".