2789147261 has 2 divisors, whose sum is σ = 2789147262. Its totient is φ = 2789147260.

The previous prime is 2789147201. The next prime is 2789147267. The reversal of 2789147261 is 1627419872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2767812100 + 21335161 = 52610^2 + 4619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2789147261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2789147267) 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, 1394573630 + 1394573631.

It is an arithmetic number, because the mean of its divisors is an integer number (1394573631).

Almost surely, 2^2789147261 is an apocalyptic number.

It is an amenable number.

2789147261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2789147261 is an equidigital number, since it uses as much as digits as its factorization.

2789147261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 2789147261 is about 52812.3779146518. The cubic root of 2789147261 is about 1407.6363768427.

The spelling of 2789147261 in words is "two billion, seven hundred eighty-nine million, one hundred forty-seven thousand, two hundred sixty-one".