2778338089 has 2 divisors, whose sum is σ = 2778338090. Its totient is φ = 2778338088.

The previous prime is 2778338071. The next prime is 2778338113. The reversal of 2778338089 is 9808338772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2401784064 + 376554025 = 49008^2 + 19405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778338089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2778330089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389169044 + 1389169045.

It is an arithmetic number, because the mean of its divisors is an integer number (1389169045).

Almost surely, 2^2778338089 is an apocalyptic number.

It is an amenable number.

2778338089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778338089 is an equidigital number, since it uses as much as digits as its factorization.

2778338089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The square root of 2778338089 is about 52709.9429804283. The cubic root of 2778338089 is about 1405.8156194394.

The spelling of 2778338089 in words is "two billion, seven hundred seventy-eight million, three hundred thirty-eight thousand, eighty-nine".