98778593 has 2 divisors, whose sum is σ = 98778594. Its totient is φ = 98778592.

The previous prime is 98778577. The next prime is 98778671. The reversal of 98778593 is 39587789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50225569 + 48553024 = 7087^2 + 6968^2 .

It is an emirp because it is prime and its reverse (39587789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98778593 - 2⁴ = 98778577 is a prime.

It is not a weakly prime, because it can be changed into another prime (98778523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389296 + 49389297.

It is an arithmetic number, because the mean of its divisors is an integer number (49389297).

Almost surely, 2^98778593 is an apocalyptic number.

It is an amenable number.

98778593 is a deficient number, since it is larger than the sum of its proper divisors (1).

98778593 is an equidigital number, since it uses as much as digits as its factorization.

98778593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The square root of 98778593 is about 9938.7420230128. The cubic root of 98778593 is about 462.2613804885.

The spelling of 98778593 in words is "ninety-eight million, seven hundred seventy-eight thousand, five hundred ninety-three".