647467783 has 2 divisors, whose sum is σ = 647467784. Its totient is φ = 647467782.

The previous prime is 647467759. The next prime is 647467837. The reversal of 647467783 is 387764746.

647467783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (647467837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647467783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647467783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647467753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323733891 + 323733892.

It is an arithmetic number, because the mean of its divisors is an integer number (323733892).

Almost surely, 2^647467783 is an apocalyptic number.

647467783 is a deficient number, since it is larger than the sum of its proper divisors (1).

647467783 is an equidigital number, since it uses as much as digits as its factorization.

647467783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 52.

The square root of 647467783 is about 25445.3882462029. The cubic root of 647467783 is about 865.1127668814.

The spelling of 647467783 in words is "six hundred forty-seven million, four hundred sixty-seven thousand, seven hundred eighty-three".