2278747109 has 2 divisors, whose sum is σ = 2278747110. Its totient is φ = 2278747108.

The previous prime is 2278747091. The next prime is 2278747111. The reversal of 2278747109 is 9017478722.

Together with previous prime (2278747091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1870303009 + 408444100 = 43247^2 + 20210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2278747109 is a prime.

Together with 2278747111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278747129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139373554 + 1139373555.

It is an arithmetic number, because the mean of its divisors is an integer number (1139373555).

Almost surely, 2^2278747109 is an apocalyptic number.

It is an amenable number.

2278747109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278747109 is an equidigital number, since it uses as much as digits as its factorization.

2278747109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 2278747109 is about 47736.2242851275. The cubic root of 2278747109 is about 1315.9277446448.

It can be divided in two parts, 22787 and 47109, that added together give a palindrome (69896).

The spelling of 2278747109 in words is "two billion, two hundred seventy-eight million, seven hundred forty-seven thousand, one hundred nine".