2163312779 has 2 divisors, whose sum is σ = 2163312780. Its totient is φ = 2163312778.

The previous prime is 2163312763. The next prime is 2163312829. The reversal of 2163312779 is 9772133612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2163312779 - 2⁴ = 2163312763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2163312709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081656389 + 1081656390.

It is an arithmetic number, because the mean of its divisors is an integer number (1081656390).

Almost surely, 2^2163312779 is an apocalyptic number.

2163312779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163312779 is an equidigital number, since it uses as much as digits as its factorization.

2163312779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 2163312779 is about 46511.4263273016. The cubic root of 2163312779 is about 1293.3213251637.

The spelling of 2163312779 in words is "two billion, one hundred sixty-three million, three hundred twelve thousand, seven hundred seventy-nine".