98778893 has 2 divisors, whose sum is σ = 98778894. Its totient is φ = 98778892.

The previous prime is 98778871. The next prime is 98778899. The reversal of 98778893 is 39887789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89056969 + 9721924 = 9437^2 + 3118^2 .

It is a cyclic number.

It is not a de Polignac number, because 98778893 - 2¹⁰ = 98777869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98778899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389446 + 49389447.

It is an arithmetic number, because the mean of its divisors is an integer number (49389447).

Almost surely, 2^98778893 is an apocalyptic number.

It is an amenable number.

98778893 is a deficient number, since it is larger than the sum of its proper divisors (1).

98778893 is an equidigital number, since it uses as much as digits as its factorization.

98778893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 59.

The square root of 98778893 is about 9938.7571154546. The cubic root of 98778893 is about 462.2618484653.

The spelling of 98778893 in words is "ninety-eight million, seven hundred seventy-eight thousand, eight hundred ninety-three".