43450109 has 2 divisors, whose sum is σ = 43450110. Its totient is φ = 43450108.

The previous prime is 43450097. The next prime is 43450139. The reversal of 43450109 is 90105434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38477209 + 4972900 = 6203^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 43450109 - 2⁸ = 43449853 is a prime.

It is a super-2 number, since 2×43450109² = 3775823944223762, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43450139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725054 + 21725055.

It is an arithmetic number, because the mean of its divisors is an integer number (21725055).

Almost surely, 2^43450109 is an apocalyptic number.

It is an amenable number.

43450109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43450109 is an equidigital number, since it uses as much as digits as its factorization.

43450109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 43450109 is about 6591.6696670874. The cubic root of 43450109 is about 351.5579770374.

The spelling of 43450109 in words is "forty-three million, four hundred fifty thousand, one hundred nine".