8778947 has 2 divisors, whose sum is σ = 8778948. Its totient is φ = 8778946.

The previous prime is 8778901. The next prime is 8778997. The reversal of 8778947 is 7498778.

8778947 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 (8778997) can be obtained adding 8778947 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8778947 - 2⁶ = 8778883 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8778895 and 8778904.

It is not a weakly prime, because it can be changed into another prime (8778997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4389473 + 4389474.

It is an arithmetic number, because the mean of its divisors is an integer number (4389474).

Almost surely, 2^8778947 is an apocalyptic number.

8778947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8778947 is an equidigital number, since it uses as much as digits as its factorization.

8778947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 50.

The square root of 8778947 is about 2962.9287875344. The cubic root of 8778947 is about 206.2912507635.

The spelling of 8778947 in words is "eight million, seven hundred seventy-eight thousand, nine hundred forty-seven".