9912169 has 2 divisors, whose sum is σ = 9912170. Its totient is φ = 9912168.

The previous prime is 9912151. The next prime is 9912211. The reversal of 9912169 is 9612199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6953769 + 2958400 = 2637^2 + 1720^2 .

It is an emirp because it is prime and its reverse (9612199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9912169 - 2⁵ = 9912137 is a prime.

It is a super-2 number, since 2×9912169² = 196502188569122, which contains 22 as substring.

9912169 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9912269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956084 + 4956085.

It is an arithmetic number, because the mean of its divisors is an integer number (4956085).

Almost surely, 2^9912169 is an apocalyptic number.

It is an amenable number.

9912169 is a deficient number, since it is larger than the sum of its proper divisors (1).

9912169 is an equidigital number, since it uses as much as digits as its factorization.

9912169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 37.

The square root of 9912169 is about 3148.3597316698. The cubic root of 9912169 is about 214.8108594371.

It can be divided in two parts, 991 and 2169, that added together give a triangular number (3160 = T₇₉).

The spelling of 9912169 in words is "nine million, nine hundred twelve thousand, one hundred sixty-nine".