98780089 has 2 divisors, whose sum is σ = 98780090. Its totient is φ = 98780088.

The previous prime is 98780063. The next prime is 98780113. The reversal of 98780089 is 98008789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98664489 + 115600 = 9933^2 + 340^2 .

It is an emirp because it is prime and its reverse (98008789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98780089 - 2⁵ = 98780057 is a prime.

It is not a weakly prime, because it can be changed into another prime (98780189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49390044 + 49390045.

It is an arithmetic number, because the mean of its divisors is an integer number (49390045).

Almost surely, 2^98780089 is an apocalyptic number.

It is an amenable number.

98780089 is a deficient number, since it is larger than the sum of its proper divisors (1).

98780089 is an equidigital number, since it uses as much as digits as its factorization.

98780089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 98780089 is about 9938.8172837617. The cubic root of 98780089 is about 462.2637141235.

The spelling of 98780089 in words is "ninety-eight million, seven hundred eighty thousand, eighty-nine".