2278653449 has 2 divisors, whose sum is σ = 2278653450. Its totient is φ = 2278653448.

The previous prime is 2278653439. The next prime is 2278653491. The reversal of 2278653449 is 9443568722.

2278653449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1985148025 + 293505424 = 44555^2 + 17132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278653449 - 2⁸ = 2278653193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2278653397 and 2278653406.

It is not a weakly prime, because it can be changed into another prime (2278653439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139326724 + 1139326725.

It is an arithmetic number, because the mean of its divisors is an integer number (1139326725).

Almost surely, 2^2278653449 is an apocalyptic number.

It is an amenable number.

2278653449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278653449 is an equidigital number, since it uses as much as digits as its factorization.

2278653449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 50.

The square root of 2278653449 is about 47735.2432590429. The cubic root of 2278653449 is about 1315.9097155151.

The spelling of 2278653449 in words is "two billion, two hundred seventy-eight million, six hundred fifty-three thousand, four hundred forty-nine".