947116109 has 2 divisors, whose sum is σ = 947116110. Its totient is φ = 947116108.

The previous prime is 947116097. The next prime is 947116111. The reversal of 947116109 is 901611749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943104100 + 4012009 = 30710^2 + 2003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947116109 is a prime.

Together with 947116111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947116169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473558054 + 473558055.

It is an arithmetic number, because the mean of its divisors is an integer number (473558055).

Almost surely, 2^947116109 is an apocalyptic number.

It is an amenable number.

947116109 is a deficient number, since it is larger than the sum of its proper divisors (1).

947116109 is an equidigital number, since it uses as much as digits as its factorization.

947116109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 947116109 is about 30775.2515668028. The cubic root of 947116109 is about 982.0518266637.

The spelling of 947116109 in words is "nine hundred forty-seven million, one hundred sixteen thousand, one hundred nine".