971117111 has 2 divisors, whose sum is σ = 971117112. Its totient is φ = 971117110.

The previous prime is 971117087. The next prime is 971117159. The reversal of 971117111 is 111711179.

971117111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971117111 - 2²⁶ = 904008247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971117611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485558555 + 485558556.

It is an arithmetic number, because the mean of its divisors is an integer number (485558556).

Almost surely, 2^971117111 is an apocalyptic number.

971117111 is a deficient number, since it is larger than the sum of its proper divisors (1).

971117111 is an equidigital number, since it uses as much as digits as its factorization.

971117111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441, while the sum is 29.

The square root of 971117111 is about 31162.7519805296. The cubic root of 971117111 is about 990.2781624925.

The spelling of 971117111 in words is "nine hundred seventy-one million, one hundred seventeen thousand, one hundred eleven".