7171217 has 2 divisors, whose sum is σ = 7171218. Its totient is φ = 7171216.

The previous prime is 7171201. The next prime is 7171223. The reversal of 7171217 is 7121717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4157521 + 3013696 = 2039^2 + 1736^2 .

It is an emirp because it is prime and its reverse (7121717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7171217 - 2⁴ = 7171201 is a prime.

It is a super-2 number, since 2×7171217² = 102852706522178, which contains 22 as substring.

It is equal to p₄₈₇₅₂₀ and since 7171217 and 487520 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (7171237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3585608 + 3585609.

It is an arithmetic number, because the mean of its divisors is an integer number (3585609).

Almost surely, 2^7171217 is an apocalyptic number.

It is an amenable number.

7171217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7171217 is an equidigital number, since it uses as much as digits as its factorization.

7171217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 686, while the sum is 26.

The square root of 7171217 is about 2677.9128066463. The cubic root of 7171217 is about 192.8402214169.

The spelling of 7171217 in words is "seven million, one hundred seventy-one thousand, two hundred seventeen".