947067857 has 2 divisors, whose sum is σ = 947067858. Its totient is φ = 947067856.

The previous prime is 947067827. The next prime is 947067859. The reversal of 947067857 is 758760749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 647397136 + 299670721 = 25444^2 + 17311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947067857 is a prime.

Together with 947067859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 947067799 and 947067808.

It is not a weakly prime, because it can be changed into another prime (947067859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473533928 + 473533929.

It is an arithmetic number, because the mean of its divisors is an integer number (473533929).

Almost surely, 2^947067857 is an apocalyptic number.

It is an amenable number.

947067857 is a deficient number, since it is larger than the sum of its proper divisors (1).

947067857 is an equidigital number, since it uses as much as digits as its factorization.

947067857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The square root of 947067857 is about 30774.4676152164. The cubic root of 947067857 is about 982.0351490994.

The spelling of 947067857 in words is "nine hundred forty-seven million, sixty-seven thousand, eight hundred fifty-seven".