109912217 has 2 divisors, whose sum is σ = 109912218. Its totient is φ = 109912216.

The previous prime is 109912199. The next prime is 109912247. The reversal of 109912217 is 712219901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106729561 + 3182656 = 10331^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 109912217 - 2²⁶ = 42803353 is a prime.

It is not a weakly prime, because it can be changed into another prime (109912247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54956108 + 54956109.

It is an arithmetic number, because the mean of its divisors is an integer number (54956109).

Almost surely, 2^109912217 is an apocalyptic number.

It is an amenable number.

109912217 is a deficient number, since it is larger than the sum of its proper divisors (1).

109912217 is an equidigital number, since it uses as much as digits as its factorization.

109912217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 109912217 is about 10483.9027561305. The cubic root of 109912217 is about 479.0144956627.

The spelling of 109912217 in words is "one hundred nine million, nine hundred twelve thousand, two hundred seventeen".