98884878779 has 2 divisors, whose sum is σ = 98884878780. Its totient is φ = 98884878778.

The previous prime is 98884878761. The next prime is 98884878787. The reversal of 98884878779 is 97787848889.

It is a strong prime.

It is an emirp because it is prime and its reverse (97787848889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98884878779 - 2¹⁶ = 98884813243 is a prime.

It is a super-2 number, since 2×98884878779² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 98884878697 and 98884878706.

It is not a weakly prime, because it can be changed into another prime (98884878709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49442439389 + 49442439390.

It is an arithmetic number, because the mean of its divisors is an integer number (49442439390).

Almost surely, 2^98884878779 is an apocalyptic number.

98884878779 is a deficient number, since it is larger than the sum of its proper divisors (1).

98884878779 is an equidigital number, since it uses as much as digits as its factorization.

98884878779 is an evil number, because the sum of its binary digits is even.

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

The spelling of 98884878779 in words is "ninety-eight billion, eight hundred eighty-four million, eight hundred seventy-eight thousand, seven hundred seventy-nine".