109431217 has 16 divisors (see below), whose sum is σ = 131788800. Its totient is φ = 88835472.

The previous prime is 109431211. The next prime is 109431221. The reversal of 109431217 is 712134901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109431217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109431211) 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 in 15 ways as a sum of consecutive naturals, for example, 13284 + ... + 19882.

It is an arithmetic number, because the mean of its divisors is an integer number (8236800).

Almost surely, 2^109431217 is an apocalyptic number.

It is an amenable number.

109431217 is a deficient number, since it is larger than the sum of its proper divisors (22357583).

109431217 is a wasteful number, since it uses less digits than its factorization.

109431217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 109431217 is about 10460.9376730769. The cubic root of 109431217 is about 478.3147163278.

The spelling of 109431217 in words is "one hundred nine million, four hundred thirty-one thousand, two hundred seventeen".