109421717 has 2 divisors, whose sum is σ = 109421718. Its totient is φ = 109421716.

The previous prime is 109421699. The next prime is 109421759. The reversal of 109421717 is 717124901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89000356 + 20421361 = 9434^2 + 4519^2 .

It is an emirp because it is prime and its reverse (717124901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109421717 - 2¹⁴ = 109405333 is a prime.

It is a super-2 number, since 2×109421717² = 23946224302456178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109421777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54710858 + 54710859.

It is an arithmetic number, because the mean of its divisors is an integer number (54710859).

Almost surely, 2^109421717 is an apocalyptic number.

It is an amenable number.

109421717 is a deficient number, since it is larger than the sum of its proper divisors (1).

109421717 is an equidigital number, since it uses as much as digits as its factorization.

109421717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 109421717 is about 10460.4835930276. The cubic root of 109421717 is about 478.3008746916.

The spelling of 109421717 in words is "one hundred nine million, four hundred twenty-one thousand, seven hundred seventeen".