1172071217 has 2 divisors, whose sum is σ = 1172071218. Its totient is φ = 1172071216.

The previous prime is 1172071177. The next prime is 1172071247. The reversal of 1172071217 is 7121702711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069028416 + 103042801 = 32696^2 + 10151^2 .

It is an emirp because it is prime and its reverse (7121702711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1172071217 - 2¹² = 1172067121 is a prime.

It is a super-2 number, since 2×1172071217² = 2747501875439722178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1172071217.

It is not a weakly prime, because it can be changed into another prime (1172071247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586035608 + 586035609.

It is an arithmetic number, because the mean of its divisors is an integer number (586035609).

Almost surely, 2^1172071217 is an apocalyptic number.

It is an amenable number.

1172071217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172071217 is an equidigital number, since it uses as much as digits as its factorization.

1172071217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1372, while the sum is 29.

The square root of 1172071217 is about 34235.5256568378. The cubic root of 1172071217 is about 1054.3496713041.

Adding to 1172071217 its reverse (7121702711), we get a palindrome (8293773928).

The spelling of 1172071217 in words is "one billion, one hundred seventy-two million, seventy-one thousand, two hundred seventeen".