98779321 has 2 divisors, whose sum is σ = 98779322. Its totient is φ = 98779320.

The previous prime is 98779301. The next prime is 98779327. The reversal of 98779321 is 12397789.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 55225 = 9936^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 98779321 - 2²¹ = 96682169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98779327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389660 + 49389661.

It is an arithmetic number, because the mean of its divisors is an integer number (49389661).

Almost surely, 2^98779321 is an apocalyptic number.

It is an amenable number.

98779321 is a deficient number, since it is larger than the sum of its proper divisors (1).

98779321 is an equidigital number, since it uses as much as digits as its factorization.

98779321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 98779321 is about 9938.7786472987. The cubic root of 98779321 is about 462.2625161106.

It can be divided in two parts, 987 and 79321, that added together give a palindrome (80308).

The spelling of 98779321 in words is "ninety-eight million, seven hundred seventy-nine thousand, three hundred twenty-one".