2279491811 has 2 divisors, whose sum is σ = 2279491812. Its totient is φ = 2279491810.

The previous prime is 2279491793. The next prime is 2279491861. The reversal of 2279491811 is 1181949722.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2279491811 - 2¹⁴ = 2279475427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2279491861) 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, 1139745905 + 1139745906.

It is an arithmetic number, because the mean of its divisors is an integer number (1139745906).

Almost surely, 2^2279491811 is an apocalyptic number.

2279491811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279491811 is an equidigital number, since it uses as much as digits as its factorization.

2279491811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 2279491811 is about 47744.0238249773. The cubic root of 2279491811 is about 1316.0710788606.

The spelling of 2279491811 in words is "two billion, two hundred seventy-nine million, four hundred ninety-one thousand, eight hundred eleven".