647799143 has 2 divisors, whose sum is σ = 647799144. Its totient is φ = 647799142.

The previous prime is 647799133. The next prime is 647799193. The reversal of 647799143 is 341997746.

It is a happy number.

647799143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (647799193) can be obtained adding 647799143 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647799143 - 2¹⁶ = 647733607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647799091 and 647799100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647799133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323899571 + 323899572.

It is an arithmetic number, because the mean of its divisors is an integer number (323899572).

Almost surely, 2^647799143 is an apocalyptic number.

647799143 is a deficient number, since it is larger than the sum of its proper divisors (1).

647799143 is an equidigital number, since it uses as much as digits as its factorization.

647799143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 647799143 is about 25451.8986128737. The cubic root of 647799143 is about 865.2603237098.

The spelling of 647799143 in words is "six hundred forty-seven million, seven hundred ninety-nine thousand, one hundred forty-three".