2798212909 has 2 divisors, whose sum is σ = 2798212910. Its totient is φ = 2798212908.

The previous prime is 2798212891. The next prime is 2798212919. The reversal of 2798212909 is 9092128972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2511012100 + 287200809 = 50110^2 + 16947^2 .

It is a cyclic number.

It is not a de Polignac number, because 2798212909 - 2⁵ = 2798212877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2798212919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399106454 + 1399106455.

It is an arithmetic number, because the mean of its divisors is an integer number (1399106455).

Almost surely, 2^2798212909 is an apocalyptic number.

It is an amenable number.

2798212909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2798212909 is an equidigital number, since it uses as much as digits as its factorization.

2798212909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 2798212909 is about 52898.1371033045. The cubic root of 2798212909 is about 1409.1598215443.

The spelling of 2798212909 in words is "two billion, seven hundred ninety-eight million, two hundred twelve thousand, nine hundred nine".