947405647 has 2 divisors, whose sum is σ = 947405648. Its totient is φ = 947405646.

The previous prime is 947405633. The next prime is 947405681. The reversal of 947405647 is 746504749.

947405647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 947405647 - 2¹¹ = 947403599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947405597 and 947405606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947405617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473702823 + 473702824.

It is an arithmetic number, because the mean of its divisors is an integer number (473702824).

Almost surely, 2^947405647 is an apocalyptic number.

947405647 is a deficient number, since it is larger than the sum of its proper divisors (1).

947405647 is an equidigital number, since it uses as much as digits as its factorization.

947405647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 46.

The square root of 947405647 is about 30779.9552793697. The cubic root of 947405647 is about 982.1518891408.

The spelling of 947405647 in words is "nine hundred forty-seven million, four hundred five thousand, six hundred forty-seven".