2128806247 has 2 divisors, whose sum is σ = 2128806248. Its totient is φ = 2128806246.

The previous prime is 2128806241. The next prime is 2128806257. The reversal of 2128806247 is 7426088212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128806247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128806241) 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, 1064403123 + 1064403124.

It is an arithmetic number, because the mean of its divisors is an integer number (1064403124).

Almost surely, 2^2128806247 is an apocalyptic number.

2128806247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128806247 is an equidigital number, since it uses as much as digits as its factorization.

2128806247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 2128806247 is about 46138.9883612547. The cubic root of 2128806247 is about 1286.4079400568.

The spelling of 2128806247 in words is "two billion, one hundred twenty-eight million, eight hundred six thousand, two hundred forty-seven".