971917 has 2 divisors, whose sum is σ = 971918. Its totient is φ = 971916.

The previous prime is 971903. The next prime is 971921. The reversal of 971917 is 719179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 86436 = 941^2 + 294^2 .

It is an emirp because it is prime and its reverse (719179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971917 - 2¹¹ = 969869 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485958 + 485959.

It is an arithmetic number, because the mean of its divisors is an integer number (485959).

2⁹⁷¹⁹¹⁷ is an apocalyptic number.

It is an amenable number.

971917 is a deficient number, since it is larger than the sum of its proper divisors (1).

971917 is an equidigital number, since it uses as much as digits as its factorization.

971917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 34.

The square root of 971917 is about 985.8585091178. The cubic root of 971917 is about 99.0549978396.

The spelling of 971917 in words is "nine hundred seventy-one thousand, nine hundred seventeen".