109521017 has 2 divisors, whose sum is σ = 109521018. Its totient is φ = 109521016.

The previous prime is 109521011. The next prime is 109521029. The reversal of 109521017 is 710125901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108388921 + 1132096 = 10411^2 + 1064^2 .

It is an emirp because it is prime and its reverse (710125901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109521017 - 2⁴ = 109521001 is a prime.

It is not a weakly prime, because it can be changed into another prime (109521011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54760508 + 54760509.

It is an arithmetic number, because the mean of its divisors is an integer number (54760509).

Almost surely, 2^109521017 is an apocalyptic number.

It is an amenable number.

109521017 is a deficient number, since it is larger than the sum of its proper divisors (1).

109521017 is an equidigital number, since it uses as much as digits as its factorization.

109521017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 109521017 is about 10465.2289511506. The cubic root of 109521017 is about 478.4455166575.

Adding to 109521017 its reverse (710125901), we get a palindrome (819646918).

The spelling of 109521017 in words is "one hundred nine million, five hundred twenty-one thousand, seventeen".