29805109 has 2 divisors, whose sum is σ = 29805110. Its totient is φ = 29805108.

The previous prime is 29805103. The next prime is 29805119. The reversal of 29805109 is 90150892.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 9284209 = 4530^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 29805109 - 2⁵ = 29805077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29805103) 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, 14902554 + 14902555.

It is an arithmetic number, because the mean of its divisors is an integer number (14902555).

Almost surely, 2^29805109 is an apocalyptic number.

It is an amenable number.

29805109 is a deficient number, since it is larger than the sum of its proper divisors (1).

29805109 is an equidigital number, since it uses as much as digits as its factorization.

29805109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 29805109 is about 5459.4055537210. The cubic root of 29805109 is about 310.0489308819.

The spelling of 29805109 in words is "twenty-nine million, eight hundred five thousand, one hundred nine".