947116091 has 2 divisors, whose sum is σ = 947116092. Its totient is φ = 947116090.

The previous prime is 947116081. The next prime is 947116097. The reversal of 947116091 is 190611749.

It is a strong prime.

It is an emirp because it is prime and its reverse (190611749) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947116091 is a prime.

It is a super-2 number, since 2×947116091² = 1794057779662240562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (947116097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473558045 + 473558046.

It is an arithmetic number, because the mean of its divisors is an integer number (473558046).

Almost surely, 2^947116091 is an apocalyptic number.

947116091 is a deficient number, since it is larger than the sum of its proper divisors (1).

947116091 is an equidigital number, since it uses as much as digits as its factorization.

947116091 is an odious number, because the sum of its binary digits is odd.

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

The square root of 947116091 is about 30775.2512743601. The cubic root of 947116091 is about 982.0518204424.

The spelling of 947116091 in words is "nine hundred forty-seven million, one hundred sixteen thousand, ninety-one".