2098857779 has 2 divisors, whose sum is σ = 2098857780. Its totient is φ = 2098857778.

The previous prime is 2098857763. The next prime is 2098857793. The reversal of 2098857779 is 9777588902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2098857779 - 2⁴ = 2098857763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2098857749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049428889 + 1049428890.

It is an arithmetic number, because the mean of its divisors is an integer number (1049428890).

Almost surely, 2^2098857779 is an apocalyptic number.

2098857779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098857779 is an equidigital number, since it uses as much as digits as its factorization.

2098857779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17781120, while the sum is 62.

The square root of 2098857779 is about 45813.2926016020. The cubic root of 2098857779 is about 1280.3469475764.

The spelling of 2098857779 in words is "two billion, ninety-eight million, eight hundred fifty-seven thousand, seven hundred seventy-nine".