917971 has 2 divisors, whose sum is σ = 917972. Its totient is φ = 917970.

The previous prime is 917951. The next prime is 917993. The reversal of 917971 is 179719.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (179719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 917971 - 2⁷ = 917843 is a prime.

It is not a weakly prime, because it can be changed into another prime (917951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458985 + 458986.

It is an arithmetic number, because the mean of its divisors is an integer number (458986).

2⁹¹⁷⁹⁷¹ is an apocalyptic number.

917971 is a deficient number, since it is larger than the sum of its proper divisors (1).

917971 is an equidigital number, since it uses as much as digits as its factorization.

917971 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 917971 is about 958.1080314871. The cubic root of 917971 is about 97.1873306208.

The spelling of 917971 in words is "nine hundred seventeen thousand, nine hundred seventy-one".