43009849 has 2 divisors, whose sum is σ = 43009850. Its totient is φ = 43009848.

The previous prime is 43009823. The next prime is 43009859. The reversal of 43009849 is 94890034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37454400 + 5555449 = 6120^2 + 2357^2 .

It is a cyclic number.

It is not a de Polignac number, because 43009849 - 2¹⁹ = 42485561 is a prime.

It is a super-2 number, since 2×43009849² = 3699694222005602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43009859) by changing a digit.

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 as a sum of consecutive naturals, namely, 21504924 + 21504925.

It is an arithmetic number, because the mean of its divisors is an integer number (21504925).

Almost surely, 2^43009849 is an apocalyptic number.

It is an amenable number.

43009849 is a deficient number, since it is larger than the sum of its proper divisors (1).

43009849 is an equidigital number, since it uses as much as digits as its factorization.

43009849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 43009849 is about 6558.1894605142. The cubic root of 43009849 is about 350.3665520336.

The spelling of 43009849 in words is "forty-three million, nine thousand, eight hundred forty-nine".