43135109 has 2 divisors, whose sum is σ = 43135110. Its totient is φ = 43135108.

The previous prime is 43135039. The next prime is 43135121. The reversal of 43135109 is 90153134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 494209 = 6530^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 43135109 - 2²⁴ = 26357893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43135129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21567554 + 21567555.

It is an arithmetic number, because the mean of its divisors is an integer number (21567555).

Almost surely, 2^43135109 is an apocalyptic number.

It is an amenable number.

43135109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43135109 is an equidigital number, since it uses as much as digits as its factorization.

43135109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 43135109 is about 6567.7324092871. The cubic root of 43135109 is about 350.7063531051.

The spelling of 43135109 in words is "forty-three million, one hundred thirty-five thousand, one hundred nine".