98779 has 2 divisors, whose sum is σ = 98780. Its totient is φ = 98778.

The previous prime is 98773. The next prime is 98801. The reversal of 98779 is 97789.

It is a weak prime.

It is an emirp because it is prime and its reverse (97789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98779 - 2¹¹ = 96731 is a prime.

It is not a weakly prime, because it can be changed into another prime (98773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389 + 49390.

It is an arithmetic number, because the mean of its divisors is an integer number (49390).

2⁹⁸⁷⁷⁹ is an apocalyptic number.

98779 is a deficient number, since it is larger than the sum of its proper divisors (1).

98779 is an equidigital number, since it uses as much as digits as its factorization.

98779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 98779 is about 314.2912661847. The cubic root of 98779 is about 46.2262015377.

Subtracting from 98779 its reverse (97789), we obtain a triangular number (990 = T₄₄).

The spelling of 98779 in words is "ninety-eight thousand, seven hundred seventy-nine".