109172917 has 16 divisors (see below), whose sum is σ = 135577600. Its totient is φ = 85788720.

The previous prime is 109172897. The next prime is 109172939. The reversal of 109172917 is 719271901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109172917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109172957) 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, 9117 + ... + 17362.

It is an arithmetic number, because the mean of its divisors is an integer number (8473600).

Almost surely, 2^109172917 is an apocalyptic number.

It is an amenable number.

109172917 is a deficient number, since it is larger than the sum of its proper divisors (26404683).

109172917 is a wasteful number, since it uses less digits than its factorization.

109172917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26536.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 109172917 is about 10448.5844495798. The cubic root of 109172917 is about 477.9380839254.

The spelling of 109172917 in words is "one hundred nine million, one hundred seventy-two thousand, nine hundred seventeen".