109208745 has 24 divisors (see below), whose sum is σ = 189803016. Its totient is φ = 58088448.

The previous prime is 109208717. The next prime is 109208767. The reversal of 109208745 is 547802901.

It can be written as a sum of positive squares in 4 ways, for example, as 19395216 + 89813529 = 4404^2 + 9477^2 .

It is not a de Polignac number, because 109208745 - 2¹¹ = 109206697 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 14809 + ... + 20921.

It is an arithmetic number, because the mean of its divisors is an integer number (7908459).

Almost surely, 2^109208745 is an apocalyptic number.

109208745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109208745 is a deficient number, since it is larger than the sum of its proper divisors (80594271).

109208745 is a wasteful number, since it uses less digits than its factorization.

109208745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521 (or 6518 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 109208745 is about 10450.2987995559. The cubic root of 109208745 is about 477.9903609104.

The spelling of 109208745 in words is "one hundred nine million, two hundred eight thousand, seven hundred forty-five".