971117087 has 2 divisors, whose sum is σ = 971117088. Its totient is φ = 971117086.

The previous prime is 971117083. The next prime is 971117111. The reversal of 971117087 is 780711179.

971117087 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 971117087 - 2² = 971117083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971117083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485558543 + 485558544.

It is an arithmetic number, because the mean of its divisors is an integer number (485558544).

Almost surely, 2^971117087 is an apocalyptic number.

971117087 is a deficient number, since it is larger than the sum of its proper divisors (1).

971117087 is an equidigital number, since it uses as much as digits as its factorization.

971117087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 41.

The square root of 971117087 is about 31162.7515954545. The cubic root of 971117087 is about 990.2781543346.

The spelling of 971117087 in words is "nine hundred seventy-one million, one hundred seventeen thousand, eighty-seven".