98778193 has 2 divisors, whose sum is σ = 98778194. Its totient is φ = 98778192.

The previous prime is 98778191. The next prime is 98778221. The reversal of 98778193 is 39187789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59490369 + 39287824 = 7713^2 + 6268^2 .

It is a cyclic number.

It is not a de Polignac number, because 98778193 - 2¹ = 98778191 is a prime.

Together with 98778191, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 98778193.

It is not a weakly prime, because it can be changed into another prime (98778191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389096 + 49389097.

It is an arithmetic number, because the mean of its divisors is an integer number (49389097).

Almost surely, 2^98778193 is an apocalyptic number.

It is an amenable number.

98778193 is a deficient number, since it is larger than the sum of its proper divisors (1).

98778193 is an equidigital number, since it uses as much as digits as its factorization.

98778193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 52.

The square root of 98778193 is about 9938.7218997213. The cubic root of 98778193 is about 462.2607565179.

The spelling of 98778193 in words is "ninety-eight million, seven hundred seventy-eight thousand, one hundred ninety-three".