2279447761 has 2 divisors, whose sum is σ = 2279447762. Its totient is φ = 2279447760.

The previous prime is 2279447749. The next prime is 2279447801. The reversal of 2279447761 is 1677449722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513210000 + 766237761 = 38900^2 + 27681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279447761 - 2⁷ = 2279447633 is a prime.

It is not a weakly prime, because it can be changed into another prime (2279447561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139723880 + 1139723881.

It is an arithmetic number, because the mean of its divisors is an integer number (1139723881).

Almost surely, 2^2279447761 is an apocalyptic number.

It is an amenable number.

2279447761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279447761 is an equidigital number, since it uses as much as digits as its factorization.

2279447761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 2279447761 is about 47743.5625084681. The cubic root of 2279447761 is about 1316.0626013417.

The spelling of 2279447761 in words is "two billion, two hundred seventy-nine million, four hundred forty-seven thousand, seven hundred sixty-one".