109908709 has 2 divisors, whose sum is σ = 109908710. Its totient is φ = 109908708.

The previous prime is 109908703. The next prime is 109908719. The reversal of 109908709 is 907809901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105165025 + 4743684 = 10255^2 + 2178^2 .

It is a cyclic number.

It is not a de Polignac number, because 109908709 - 2¹¹ = 109906661 is a prime.

It is a super-3 number, since 3×109908709³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109908703) 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, 54954354 + 54954355.

It is an arithmetic number, because the mean of its divisors is an integer number (54954355).

Almost surely, 2^109908709 is an apocalyptic number.

It is an amenable number.

109908709 is a deficient number, since it is larger than the sum of its proper divisors (1).

109908709 is an equidigital number, since it uses as much as digits as its factorization.

109908709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 109908709 is about 10483.7354506874. The cubic root of 109908709 is about 479.0093994724.

The spelling of 109908709 in words is "one hundred nine million, nine hundred eight thousand, seven hundred nine".