97787848889 has 2 divisors, whose sum is σ = 97787848890. Its totient is φ = 97787848888.

The previous prime is 97787848883. The next prime is 97787848901. The reversal of 97787848889 is 98884878779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67125037225 + 30662811664 = 259085^2 + 175108^2 .

It is an emirp because it is prime and its reverse (98884878779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97787848889 - 2³⁶ = 29068372153 is a prime.

It is not a weakly prime, because it can be changed into another prime (97787848883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48893924444 + 48893924445.

It is an arithmetic number, because the mean of its divisors is an integer number (48893924445).

Almost surely, 2^97787848889 is an apocalyptic number.

It is an amenable number.

97787848889 is a deficient number, since it is larger than the sum of its proper divisors (1).

97787848889 is an equidigital number, since it uses as much as digits as its factorization.

97787848889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3641573376, while the sum is 83.

The spelling of 97787848889 in words is "ninety-seven billion, seven hundred eighty-seven million, eight hundred forty-eight thousand, eight hundred eighty-nine".