971567111 has 2 divisors, whose sum is σ = 971567112. Its totient is φ = 971567110.

The previous prime is 971567087. The next prime is 971567117. The reversal of 971567111 is 111765179.

971567111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971567111 - 2¹⁸ = 971304967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971567117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485783555 + 485783556.

It is an arithmetic number, because the mean of its divisors is an integer number (485783556).

Almost surely, 2^971567111 is an apocalyptic number.

971567111 is a deficient number, since it is larger than the sum of its proper divisors (1).

971567111 is an equidigital number, since it uses as much as digits as its factorization.

971567111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 38.

The square root of 971567111 is about 31169.9713025213. The cubic root of 971567111 is about 990.4310985129.

The spelling of 971567111 in words is "nine hundred seventy-one million, five hundred sixty-seven thousand, one hundred eleven".