647855233 has 2 divisors, whose sum is σ = 647855234. Its totient is φ = 647855232.

The previous prime is 647855207. The next prime is 647855249. The reversal of 647855233 is 332558746.

647855233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640494864 + 7360369 = 25308^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 647855233 - 2²⁵ = 614300801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647855233.

It is not a weakly prime, because it can be changed into another prime (647855833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323927616 + 323927617.

It is an arithmetic number, because the mean of its divisors is an integer number (323927617).

Almost surely, 2^647855233 is an apocalyptic number.

It is an amenable number.

647855233 is a deficient number, since it is larger than the sum of its proper divisors (1).

647855233 is an equidigital number, since it uses as much as digits as its factorization.

647855233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 43.

The square root of 647855233 is about 25453.0004714572. Note that the first 3 decimals coincide. The cubic root of 647855233 is about 865.2852959827.

The spelling of 647855233 in words is "six hundred forty-seven million, eight hundred fifty-five thousand, two hundred thirty-three".