8172917 has 2 divisors, whose sum is σ = 8172918. Its totient is φ = 8172916.

The previous prime is 8172911. The next prime is 8172919. The reversal of 8172917 is 7192718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5193841 + 2979076 = 2279^2 + 1726^2 .

It is a cyclic number.

It is not a de Polignac number, because 8172917 - 2¹⁰ = 8171893 is a prime.

Together with 8172919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8172911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4086458 + 4086459.

It is an arithmetic number, because the mean of its divisors is an integer number (4086459).

Almost surely, 2^8172917 is an apocalyptic number.

It is an amenable number.

8172917 is a deficient number, since it is larger than the sum of its proper divisors (1).

8172917 is an equidigital number, since it uses as much as digits as its factorization.

8172917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 35.

The square root of 8172917 is about 2858.8314046127. The cubic root of 8172917 is about 201.4307158557.

The spelling of 8172917 in words is "eight million, one hundred seventy-two thousand, nine hundred seventeen".